question: What has been supplied by the county since the 1920 's
answer: the county has supplied aggregates . Foster Yeoman is Europe 's large supplier of limestone aggregates
turker_answer: Aggregates have been supplied by the county since the 1920 's ; Foster Yeoman is Europe 's large supplier of limestone aggregates .
rule-based: The county has supplied aggregates . Foster Yeoman is Europe 's large supplier of limestone aggregates has been supplied by the county since the 1920 's