Because they were living in a, in an apartment basically.
( ( Because ( they ( were ( ( living ( in ( ( a , ) ( in ( an apartment ) ) ) ) ) basically ) ) ) ) . )
(ROOT (FRAG (SBAR (IN Because) (S (NP (PRP they)) (VP (VBD were) (VP (VBG living) (PP (IN in) (NP (NP (SYM a)) (, ,) (PP (IN in) (NP (DT an) (NN apartment))))) (ADVP (RB basically)))))) (. .)))
They used to live in an apartment. 
( They ( ( used ( to ( live ( in ( an apartment ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBD used) (S (VP (TO to) (VP (VB live) (PP (IN in) (NP (DT an) (NN apartment))))))) (. .)))