The task is to find the relation between e1 and e2 from the label list. The relation type can have two directions (e1, e2) or (e2, e1), depending on the context of the sentence.\nGiven Sentence: "The Pulitzer Committee issues an official <e1>citation</e1> explaining the <e2>reasons</e2> for the award."\nChoose one of following choices: relations_dict = {\n'Cause-Effect(e1, e2)': 0,\n'Cause-Effect(e2, e1)': 1,\n'Component-Whole(e1, e2)': 2,\n'Component-Whole(e2, e1)': 3,\n'Content-Container(e1, e2)': 4,\n'Content-Container(e2, e1)': 5,\n'Entity-Destination(e1, e2)': 6,\n'Entity-Destination(e2, e1)': 7,\n'Entity-Origin(e1, e2)': 8,\n'Entity-Origin(e2, e1)': 9,\n'Instrument-Agency(e1, e2)': 10,\n'Instrument-Agency(e2, e1)': 11,\n'Member-Collection(e1,e2)': 12,\n'Member-Collection(e2,e1)': 13,\n'Message-Topic(e1,e2)': 14,\n'Message-Topic(e2,e1)': 15,\n'Product-Producer(e1,e2)': 16,\n'Product-Producer(e2,e1)': 17,\n'Other': 18\n}\nPlease just choose one from the above relations_dict without any explanations.