( ( quadruplets ( ( Any one ) ( of ( ( four offspring ) ( ( born ( at ( the ( same time ) ) ) ) ( during ( a ( single pregnancy ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB quadruplets) (NP (NP (DT Any) (NN one)) (PP (IN of) (NP (NP (CD four) (NN offspring)) (VP (VBN born) (PP (IN at) (NP (DT the) (JJ same) (NN time))) (PP (IN during) (NP (DT a) (JJ single) (NN pregnancy)))))))) (. .)))
quadruplets Any one of four offspring born at the same time during a single pregnancy.
(ROOT (S (NP (NP (CD Four) (NNS children)) (VP (VBN born) (PP (IN at) (NP (CD one) (NN birth))))) (VP (VBP are) (VP (VBN called) (NP (NNS quadruplets)))) (. .)))