Task: Information Extraction
Input (English): Sentence1: One week a couple received a call from an old friend. Sentence2: The friend planned to be in town and asked to stay with the couple. Sentence3: They spent the week cleaning their home. Sentence4: However, at the last minute the friend said he couldn't make it. Sentence5: They were disappointed but happy that they had a clean house.
Output (English): Couple, Friend