question: Why did top engineers in Germany go to the natural history museum ?
answer: They wanted to search for a model to base on for building a more-efficient car .
turker_answer: Top engineers in Germany went to the natural history museum to search for a model to base on for building a more-efficient car .
rule-based: Top engineers in Germany went to the natural history museum because they wanted to search for a model to base on for building a more-efficient car .