(S (S (BASENP (NNP Soulas)) (VP (VBD lost) (NP (BASENP (PRPD his) (NN daughter) (CC and) (NN son-in-law)) (COMMA ,) (SBAR (WHNP (WP who)) (S (S (VP (VBD were) (PP (PP (IN on) (BASENP (NN board))) (BASENP (DT the) (NN flight))))) (SBAR (WHADVP (WRB when)) (S (BASENP (PRP it)) (VP (VBD crashed))))))))) (PERIOD .))