past a child 's interest and an adult 's patience 
(ROOT (PP (IN past) (NP (NP (NP (DT a) (NN child) (POS 's)) (NN interest)) (CC and) (NP (NP (DT an) (NN adult) (POS 's)) (NN patience)))))
(ROOT (PP (IN ) (NP (NP (NP (DT ) (NN ) (POS )) (NN )) (CC ) (NP (NP (DT ) (NN ) (POS )) (NN )))))