diff --git a/src/Data/Language/Ruby.hs b/src/Data/Language/Ruby.hs
index b1671a4..4b87688 100644
--- a/src/Data/Language/Ruby.hs
+++ b/src/Data/Language/Ruby.hs
@@ -35,16 +35,21 @@ deriving stock instance Eq Block
 deriving stock instance Generic Block
 instance ToJSON Block where
   toEncoding = Aeson.genericToEncoding aesonOptions
+deriving newtype instance Semigroup Block
+deriving newtype instance Monoid Block
 
 instance FromJSON Block where
   parseJSON = withArray "Block" $ \as -> case Vector.toList as of
     (String "begin":xs) -> Block <$> traverse parseJSON xs
     _ -> Block . pure <$> parseJSON (Array as)
 
+-- Should be 'expression'
 data Definition
   = DefModule Module
   | DefFunction Function
   | DefSend Send
+  | DefRBlock RBlock
+  | DefAnything Anything
 
 deriving stock instance Show Definition
 deriving stock instance Ord Definition
@@ -55,16 +60,54 @@ instance ToJSON Definition where
     where
     opts = aesonOptions { Aeson.constructorTagModifier = go }
     go = \case
-      "DefModule" -> "module"
+      "DefModule"   -> "module"
       "DefFunction" -> "function"
-      "DefSend" -> "send"
-      x -> x
+      "DefSend"     -> "send"
+      "DefRBlock"   -> "block"
+      x             -> x
 
 instance FromJSON Definition where
   parseJSON v
-    =   (DefModule <$> parseJSON v)
+    =   (DefModule   <$> parseJSON v)
     <|> (DefFunction <$> parseJSON v)
-    <|> (DefSend <$> parseJSON v)
+    <|> (DefSend     <$> parseJSON v)
+    <|> (DefRBlock   <$> parseJSON v)
+    <|> (DefAnything <$> parseJSON v)
+
+newtype Anything = Anything Value
+
+deriving stock instance Show Anything
+instance Ord Anything where
+  compare = coerce compareValue
+deriving stock instance Eq Anything
+deriving stock instance Generic Anything
+instance ToJSON Anything where
+  toEncoding = Aeson.genericToEncoding aesonOptions
+deriving newtype instance FromJSON Anything
+
+-- f do |x|
+--   expr
+-- end
+data RBlock = RBlock
+  { send  :: Send
+  , args  :: Args
+  , block :: Block
+  }
+
+deriving stock instance Show RBlock
+deriving stock instance Ord RBlock
+deriving stock instance Eq RBlock
+deriving stock instance Generic RBlock
+instance ToJSON RBlock where
+  toEncoding = Aeson.genericToEncoding aesonOptions
+instance FromJSON RBlock where
+  parseJSON = withArray "RBlock" $ \as -> case Vector.toList as of
+    (String "block":send:args:block:[])
+      ->  RBlock
+      <$> parseJSON send
+      <*> parseJSON args
+      <*> parseJSON block
+    _ -> empty
 
 newtype Namespace = Namespace [Name]
 
@@ -81,7 +124,7 @@ instance FromJSON Namespace where
   parseJSON = \case
     Null -> pure mempty
     Array [String "const", namespace, String name] -> (<> Namespace [Name $ String name]) <$> parseJSON namespace
-    x -> error $ show x
+    _ -> empty
 
 data Send = Send
   { args :: Args
@@ -122,12 +165,16 @@ instance FromJSON Module where
     [String "module", name, block]
       ->  Module
       <$> parseJSON name
-      <*> parseMaybeBlock block
+      <*> parseMaybe block
+    [String "class", name, _, block]
+      ->  Module
+      <$> parseJSON name
+      <*> parseMaybe block
     _ -> empty
 
-parseMaybeBlock :: Value -> Aeson.Parser Block
-parseMaybeBlock = \case
-  Null -> pure (Block mempty)
+parseMaybe :: FromJSON m => Monoid m => Value -> Aeson.Parser m
+parseMaybe = \case
+  Null -> pure mempty
   x -> parseJSON x
 
 data Function = Function
@@ -143,7 +190,7 @@ deriving stock instance Generic Function
 instance ToJSON Function where
   toEncoding = Aeson.genericToEncoding aesonOptions
 
-newtype Args = Args Value
+newtype Args = Args Anything
 
 deriving stock instance Show Args
 instance Ord Args where
@@ -154,7 +201,7 @@ instance ToJSON Args where
   toEncoding = Aeson.genericToEncoding aesonOptions
 
 instance FromJSON Args where
-  parseJSON = pure . Args
+  parseJSON = pure . coerce
 
 instance FromJSON Function where
   parseJSON = withArray "Function" $ \case
@@ -162,7 +209,7 @@ instance FromJSON Function where
       ->  Function
       <$> parseJSON name
       <*> parseJSON args
-      <*> parseMaybeBlock block
+      <*> parseMaybe block
     _ -> empty
 
 newtype Name = Name Value
diff --git a/src/Rubyhs.hs b/src/Rubyhs.hs
index 10a081e..8cd4deb 100644
--- a/src/Rubyhs.hs
+++ b/src/Rubyhs.hs
@@ -20,7 +20,7 @@ run :: FilePath -> IO ()
 run p = do
   json <- runParser p
   block <- decodeFail @_ @Block $ ByteString.pack json
-  -- ByteString.putStrLn $ encode block
+  ByteString.putStrLn $ encode block
   ByteString.putStrLn $ encode $ references block
 
 decodeFail :: MonadFail m => FromJSON a => ByteString -> m a
diff --git a/src/Rubyhs/References.hs b/src/Rubyhs/References.hs
index 716d2d6..938ca38 100644
--- a/src/Rubyhs/References.hs
+++ b/src/Rubyhs/References.hs
@@ -160,6 +160,9 @@ instance References Definition where
     DefModule m -> entries m
     DefFunction f -> entries f
     DefSend s -> entries s
+    -- TODO:
+    DefRBlock{} -> pure ()
+    DefAnything{} -> pure ()
 
 instance References Module where
   entries Module{name, block} = do