Task: Information Extraction
Input (English): Sentence1: Mary found an emerald stone in a cave while traveling. Sentence2: She had it examined by an expert to ascertain its value. Sentence3: As it was very valuable, she insured it. Sentence4: And she had it mounted as a necklace. Sentence5: When a thief stole it, she was rich, but missed her souvenir.
Output (English): Mary, Expert, Thief