( ( ( A ( prime quadruplet ) ) ( of ( this form ) ) ) ( ( ( is also ) ( called ( a ( prime decade ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (JJ prime) (NN quadruplet)) (PP (IN of) (NP (DT this) (NN form)))) (VP (VBZ is) (ADVP (RB also)) (VP (VBN called) (NP (DT a) (JJ prime) (NN decade)))) (. .)))
A prime quadruplet of this form is also called a prime decade.
(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)))) (. .)))