( ( That part ) ( ( ( 's ( ( kind of ) hard ) ) ( because ( it ( 's ( a ( family thing ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT That) (NN part)) (VP (VBZ 's) (ADJP (ADVP (NN kind) (IN of)) (JJ hard)) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ 's) (NP (DT a) (NN family) (NN thing)))))) (. .)))
That part's kind of hard because it's a family thing.
(ROOT (S (NP (NNP Haumea)) (VP (VBZ is) (NP (NP (NN part)) (PP (IN of) (NP (DT the) (DT a) (JJ collisional) (NN family))))) (. .)))