question: What field did Muḥammad ibn Jābir al-Ḥarrānī al-Battānī contribute to ?
answer: astronomy
turker_answer: Muḥammad ibn Jābir al-Ḥarrānī al-Battānī contributed to astronomy .
rule-based: Muḥammad ibn Jābir al-Ḥarrānī al-Battānī contributed to astronomy .