_:b61511451 "2014-09-15"^^ . _:b61511449 _:b61511450 . _:b61511449 _:b61511452 . _:b61511453 "2015-09-20"^^ . _:b61511450 _:b61511451 . _:b61511449 . _:b61511452 _:b61511453 .