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: A woman was walking. Sentence2: She sat on a bench. Sentence3: There was a man next to her. Sentence4: She realized it was her ex husband. Sentence5: This must have been accidental.
Ex husband, A woman, A man

Sentence1: I had a glass of water. Sentence2: I thought it tasted bland. Sentence3: I opened my refrigerator. Sentence4: I found a lemon in the door. Sentence5: I squeezed lemon into my water.
I (myself)

Sentence1: Mary liked to go fishing. Sentence2: She went fishing every weekend of the summer. Sentence3: She had not caught anything impressive. Sentence4: Then one day she got a big bite. Sentence5: She had caught a five foot shark.
Shark, Mary