In the late 1990s, these extremist groups suffered major defeats by Kurdish forces.
( ( In ( the ( late 1990s ) ) ) ( , ( ( these ( extremist groups ) ) ( ( ( suffered ( major defeats ) ) ( by ( Kurdish forces ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT the) (JJ late) (NNS 1990s))) (, ,) (NP (DT these) (NN extremist) (NNS groups)) (VP (VBD suffered) (NP (JJ major) (NNS defeats)) (PP (IN by) (NP (NNP Kurdish) (NNS forces)))) (. .)))
Kurdish forces were able to win over the extremist groups.
( ( Kurdish forces ) ( ( were ( able ( to ( ( win over ) ( the ( extremist groups ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Kurdish) (NNS forces)) (VP (VBD were) (ADJP (JJ able) (S (VP (TO to) (VP (VB win) (PRT (RP over)) (NP (DT the) (NN extremist) (NNS groups))))))) (. .)))