Task: Information Extraction
Input (English): Sentence1: My coworker's son was allergic to peanut. Sentence2: One day, one of his classmates had a sandwich. Sentence3: His classmate offered him the sandwich. Sentence4: He forgot to asked what was the butter of the sandwich. Sentence5: After he ate, he begun to scratch his body.
Output (English): His classmate, Coworker's son