( ( ( ( Pinworms ( rely ( on ( sexual reproduction ) ) ) ) -- ) ( they ( ( are not ) ( able ( to ( ( produce offspring ) asexually ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Pinworms)) (VP (VBP rely) (PP (IN on) (NP (JJ sexual) (NN reproduction))))) (: --) (S (NP (PRP they)) (VP (VBP are) (RB not) (ADJP (JJ able) (S (VP (TO to) (VP (VB produce) (NP (NN offspring)) (ADVP (RB asexually)))))))) (. .)))
Pinworms rely on sexual reproduction -- they are not able to produce offspring asexually.
(ROOT (S (NP (NP (DT The) (JJ primary) (NN advantage)) (PP (IN of) (NP (NP (JJ sexual) (NN reproduction)) (SBAR (WHADVP (WRB when)) (S (VP (VBN compared) (PP (TO to) (NP (JJ asexual) (NN reproduction))))))))) (VP (VBZ is) (SBAR (IN that) (S (NP (EX there)) (VP (VBZ is) (NP (NP (JJR greater) (JJ genetic) (NN variety)) (PP (IN in) (NP (NN offspring)))))))) (. .)))