question: Compared to the Ordovician glaciation , how big were the ice caps on Gondwana during the Silurian ?
answer: less extensive
turker_answer: Compared to the Ordovician glaciation , the ice caps on Gondwana during the Silurian were less extensive .
rule-based: Compared to the Ordovician glaciation , the ice caps on Gondwana during the Silurian were less extensive .