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(
#comment
(let mr_source (DataSource 'yt 'plato))
(let x (Read! world mr_source (Key '('table (String 'Input))) '('key 'subkey 'value) '()))
(let world (Left! x))
(let table1 (Right! x))
(let table1map (Map table1 (lambda '(item) (block '(
(let value (Member item 'value))
(let myStruct (AsStruct '('a (String 'z))))
(let flatten (FlattenMembers '('"first_" item) '('"second_" (Just myStruct))))
(let newValue value)
(let newValue (Concat newValue (String '" => ")))
(let newValue (Concat newValue (Concat (String '" ") (Member flatten 'first_key))))
(let newValue (Concat newValue (Concat (String '" ") (Coalesce (Member flatten 'second_a) (String '"")))))
(let s (Struct))
(let s (AddMember s 'key (Member item 'key)))
(let s (AddMember s 'subkey (Member item 'subkey)))
(let s (AddMember s 'value newValue))
(return s)
)))))
(let mr_sink (DataSink 'yt (quote plato)))
(let world (Write! world mr_sink (Key '('table (String 'Output))) table1map '('('mode 'append))))
(let world (Commit! world mr_sink))
(return world)
)
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