( ( Since ( ( each armadillo ) ( always ( ( gives birth ) ( to ( four ( identical quadruplets ) ) ) ) ) ) ) ( , ( ( ( a female ) ( pregnant ( with ( male offspring ) ) ) ) ( ( can ( start ( a ( whole ( new population ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Since) (S (NP (DT each) (NN armadillo)) (ADVP (RB always)) (VP (VBZ gives) (NP (NN birth)) (PP (TO to) (NP (CD four) (JJ identical) (NNS quadruplets)))))) (, ,) (NP (NP (DT a) (NN female)) (ADJP (JJ pregnant) (PP (IN with) (NP (JJ male) (NN offspring))))) (VP (MD can) (VP (VB start) (NP (DT a) (JJ whole) (JJ new) (NN population)))) (. .)))
Since each armadillo always gives birth to four identical quadruplets, a female pregnant with male offspring can start a whole new population.
(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)))) (. .)))