oh it's fun i call
( oh ( ( it 's ) ( fun ( i call ) ) ) )
(ROOT (PP (VBN oh) (NP (NP (PRP it) (POS 's)) (FW fun) (FW i) (NN call))))
I like calling my friends for fun.
( I ( ( like ( ( calling ( my friends ) ) ( for fun ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP like) (S (VP (VBG calling) (NP (PRP$ my) (NNS friends)) (PP (IN for) (NP (NN fun)))))) (. .)))