Input (grade 13): In the early 1st century BC, the Greek epigrammatist Antipater of Thessalonica made the first clear reference to the waterwheel which he praised for its use in grinding grain and the reduction of human labour.
Output (grade 9): In the 1st century BC, the Greek epigrammatist Antipater of Thessalonica was the first to make a reference to the waterwheel. He praised it for its use in grinding grain and the reduction of human labor.