they presume their audience wo n't sit still for a sociology lesson , however entertainingly presented , so they trot out the conventional science-fiction elements of bug-eyed monsters and futuristic women in skimpy clothes . 
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(ROOT (S (NP (PRP )) (VP (VP (VBP ) (SBAR (S (NP (PRP$ ) (NN )) (VP (MD ) (RB ) (VP (VB ) (ADVP (RB )) (PP (IN ) (NP (NP (DT ) (NN ) (NN )) (, ) (VP (WHADVP (RB ) (RB )) (VBN ))))))))) (, ) (SBAR (IN ) (S (NP (PRP )) (VP (VBP ) (PRT (RP )) (NP (NP (DT ) (JJ ) (NML (NN ) (HYPH ) (NN )) (NNS )) (PP (IN ) (NP (NP (ADJP (NN ) (HYPH ) (VBN )) (NNS )) (CC ) (NP (NP (JJ ) (NNS )) (PP (IN ) (NP (JJ ) (NNS ))))))))))) (. )))