unconcerned about what they ingest 
(ROOT (ADJP (JJ unconcerned) (PP (IN about) (SBAR (WHNP (WP what)) (S (NP (PRP they)) (VP (VBP ingest)))))))
(ROOT (ADJP (JJ ) (PP (IN ) (SBAR (WHNP (WP )) (S (NP (PRP )) (VP (VBP )))))))