Question: Clara Lieber worked with the German chemist in the fields of what two disciplines?
Sentence (from "Otto Hahn"): Otto Hahn, {'1': ", '2': ", '3': ", '4': "} , {'1': ", '2': ", '3': 'ForMemRS', '4': "} (8 March 1879 – 28 July 1968) was a German chemist and pioneer in the fields of radioactivity and radiochemistry.
Relevant evidence: Yes