Task: Wrong Candidate Generation
Input (English): Context: At eight am sharp , the crane arrived . While he set up the rig , I removed the extra tar paper and ice shield underlayments that had been wrapped over the peaks as a temporary rain proofing . Not that we have had any rain lately . 
Question: What may be the reason for the rain proofing material ? 
Correct Answer: They needed to protect their construction work from rain .
Output (English): They wanted to keep the construction invisible .