yeah they were my favorite team for a while
( yeah ( they ( were ( ( my ( favorite team ) ) ( for ( a while ) ) ) ) ) )
(ROOT (S (VP (VB yeah) (SBAR (S (NP (PRP they)) (VP (VBD were) (NP (NP (PRP$ my) (JJ favorite) (NN team)) (PP (IN for) (NP (DT a) (NN while))))))))))
They had been my favorite team. 
( They ( ( had ( been ( my ( favorite team ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBD had) (VP (VBN been) (NP (PRP$ my) (JJ favorite) (NN team)))) (. .)))