Sentence:  During fiscal year 1959 , six courses were <WSD>conducted</WSD> : Forensic Pathology , Application of Histochemistry to Pathology , Pathology of Diseases of Laboratory Animals , Opthalmic Pathology , Pathology of the Oral Regions , and a Cardiovasculatory Pathology Seminar . 
Meaning of the word marked with <WSD> tags:  lead, as in the performance of a composition; Barenboim conducted the Chicago symphony for years"