Question: what's the name for a chunk of space debris that is still floating in space
[{'answer': 'Space debris', 'provenance': [{'wikipedia_id': '266344', 'title': 'Space debris', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]