Q: In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.
Sentence1: Tom and Mary decided to ride the 4-wheeler out to cut a Christmas Tree. Sentence2: They drove deep into the woods and found the perfect 7' tree. Sentence3: They easily hooked it to the bike and started towing it home. Sentence4: Unfortunately, the 4-wheeler ran out of gas half way home. Sentence5: Tom and Mary had to carry the tree all the way back.
A:
Mary, Tom