(S (S (S (BASENP (EX There)) (VP (VBP are) (NP (BASENP (JJ conflicting) (NNS reports)) (PP (IN on) (SBAR (SBAR (WHNP (WHADJP (WRB how) (JJ many)) (NNS people)) (S (VP (VBD were) (PP (IN on) (BASENP (NN board)))))) (CC and) (SBAR (WHNP (WRB how) (JJ many)) (S (VP (VBD died) (PP (IN in) (BASENP (DT the) (NNP Bahr) (NNP Gazal) (NN crash))))))))))) (CONJP (COMMA ,) (CC but)) (S (NP (QP (ADVP (IN at) (JJS least)) (NN twenty)) (NNS people)) (VP (VBD were) (PP (IN on) (BASENP (NN board)))))) (PERIOD .))