(S (S (S (BASENP (DT The) (NNP Bucharest-London) (NNS flights)) (VP (MD will) (VP (VB run) (PP (IN on) (NP (NP (BASENP (NNP Monday)) (COMMA ,) (BASENP (NNP Thursday))) (CC and) (BASENP (NNP Saturday))))))) (COMMA ,) (SBAR (IN while) (S (BASENP (DT the) (NN return) (NNS flights)) (VP (MD will) (VP (VB run) (PP (IN on) (NP (NP (BASENP (NNP Wednesday)) (COMMA ,) (BASENP (NNP Friday))) (CC and) (BASENP (NNP Sunday))))))))) (PERIOD .))