Given the task definition and input, reply with output. You need to read the given passage and construct a question about the information present in the passage. The question should be answerable from the passage. Most importantly, only those questions are allowed whose answers cannot be determined from a single sentence. Do not generate questions that require only a single sentence to answer. Instead, try to combine two sentences and create a question from that combination. Do not create open-ended questions, i.e., the answers to them cannot be found precisely from the information provided in the passage.

Paragraph- Sent 1: Amateur tennis star Guy Haines wants to divorce his vulgar and unfaithful wife Miriam , so he can marry the elegant and beautiful Anne Morton , daughter of a senator .
Sent 2: While on a train to meet Miriam , Haines meets Bruno Anthony , a forward stranger who recognizes Guy from gossip items in the newspapers that detail his marital problems .
Sent 3: During lunch in Bruno 's compartment , Bruno tells Guy about his idea for the perfect `` Criss-cross '' murder : he will kill Miriam and in exchange , Guy will kill Bruno 's father .
Sent 4: Since both are strangers , otherwise unconnected , there is no identifiable motive for the crimes , Bruno contends , hence no suspicion .
Sent 5: Guy hurriedly leaves the compartment but leaves Bruno thinking he has agreed to the deal .
Sent 6: Guy accidentally leaves his cigarette lighter behind , a gift from Anne to Guy , which Bruno pockets .
Sent 7: Bruno heads to Guy 's hometown of Metcalf and follows Miriam and her two beaux to an amusement park , where he briefly illuminates her face with Guy 's lighter , then strangles her to death .
Sent 8: Guy 's problems begin when his alibi an inebriated college professor on the same train as Guy can not remember their meeting .
Sent 9: But they increase exponentially when Bruno makes repeated appearances into Guy 's life as he seeks to remind Guy that he is now obliged to kill Bruno 's father , according to the bargain he thinks they struck on the train .
Sent 10: Bruno sends Guy the keys to his house , a map to his father 's room , and a pistol .
Sent 11: Soon after , Bruno appears at a party at Senator Morton 's house and hobnobs with the guests , much to Guy 's apprehension and Anne 's increasing suspicion .

What does Guy leave behind?