(SBARQ (SBARQ (WHNP (WDT What) (BASENP (JJ other) (NNS factors))) (SQ (VP (MD can) (VP (VB be) (VP (VP (VBN used) (S (VP (TO to) (VP (VB explain) (NP (BASENP (DT the) (JJ relative) (NNS differences)) (PP (IN in) (BASENP (NN media) (NN attention)))))))) (PP (JJ other) (PP (IN than) (BASENP (NN performance))))))))) (PERIOD ?))