can you locate for me a train that leaves on tuesday after 3:15 pm ? thanks .
{'service': 'train', 'act': 'inform', 'slot_name': 'depart', 'value': 'cambridge '} {'service': 'train', 'act': 'inform', 'slot_name': 'day', 'value': 'tuesday'} {'service': 'train', 'act': 'inform', 'slot_name': 'dest', 'value': 'london kings cross'} {'service': 'train', 'act': 'inform', 'slot_name': 'leave', 'value': '15:00 '} {'service': 'train', 'act': 'inform', 'slot_name': 'arrive', 'value': ' 15:51'}
there is a train that leaves cambridge at 15:00 and arrives at london kings cross at 15:51 on tuesday .