Sentence:  From 1 July 1960 through 31 January 1961 , six courses were <WSD>conducted</WSD> : Workshop in Resident Training in Pathology , Pathology of Diseases of Laboratory Animals , Application of Histochemistry of Pathology , Orthopedic Pathology , Forensic Sciences Symposium , and Forensic Pathology . 
Meaning of the word marked with <WSD> tags:  lead, as in the performance of a composition; Barenboim conducted the Chicago symphony for years"