(S (S (BASENP (PRP They)) (VP (VP (VBD looked) (PP (IN at) (NP (BASENP (DT the) (NN DNA)) (PP (IN of) (NP (NP (BASENP (NN 110) (NNS people)) (PP (IN with) (BASENP (NN migraine)))) (CC and) (NP (BASENP (NNS members)) (PP (IN of) (BASENP (PRPD their) (NN family))))))))) (CONJP (COMMA ,) (CC and)) (VP (VBD found) (SBAR (IN that) (S (BASENP (NNP TRESK)) (VP (VBD was) (NP (BASENP (DT a) (JJ major) (NN component)) (PP (IN in) (BASENP (NNS migraines)))))))))) (PERIOD .))