b. Johnwa ainugono kenkyuu no sai, Marywa suwahirigono tyoosa no sai, ronbuno kaita.
John-TOP Ainu-GEN research GEN occasion, Mary-TOP Swahili-GEN survey GEN occasion, paper-ACC wrote
John wrote a paper on the occasion of studying Ainu and Mary did so on the occasion of surveying Swahili.