question: What was the first scientific study of how earthworms help soil ?
answer: The Formation of Vegetable Mould through the Action of Worms
turker_answer: The first scientific study of how earthworms helped soil was the Formation of Vegetable Mould through the Action of Worms .
rule-based: The first scientific study of how earthworms help soil was the Formation of Vegetable Mould through the Action of Worms .