question: During what centuries was Ibn Sina ranked among such medical greats as Hippocrates ?
answer: early fourteenth to the mid-sixteenth centuries
turker_answer: Ibn Sina was ranked among such medical greats as Hippocrates during the early fourteenth to the mid-sixteenth centuries .
rule-based: Ibn Sina was ranked among such medical greats as Hippocrates during early fourteenth to the mid-sixteenth centuries .