Task: Question Generation
Input (English): Passage: Between the first and second season of promenade concerts, Wood did his last work in the opera house, conducting Stanford's new opera Shamus O'Brien at the Opera Comique. It ran from March until July 1896, leaving Wood enough time to prepare the second Queen's Hall season, which began at the end of August. The season was so successful that Newman followed it with a winter season of Saturday night promenade concerts, but despite being popular they were not a financial success, and were not repeated in later years. In January 1897 Wood took on the direction of the Queen's Hall's prestigious Saturday afternoon symphony concerts. He continually presented new works by composers of many nationalities, and was particularly known for his skill in Russian music. Sullivan wrote to him in 1898, "I have never heard a finer performance in England than that of the Tchaikovsky symphony under your direction last Wednesday". Seventy-five years later, Sir Adrian Boult ranked Wood as one of the two greatest Tchaikovsky conductors in his long experience. Wood also successfully challenged the widespread belief that Englishmen were not capable of conducting Wagner. When Wood and the Queen's Hall Orchestra performed at Windsor Castle in November 1898, Queen Victoria chose Tchaikovsky and Wagner for the programme. Wood, who modelled his appearance on Nikisch, took it as a compliment that the queen said to him, "Tell me, Mr Wood, are you quite English?"In 1898, Wood married one of his singing pupils, Olga Michailoff, a divorcée a few months his senior. Jacobs describes it as "a marriage of perfect professional and private harmony". As a singer, with Wood as her accompanist, she won praise from the critics.
Output (English): What is the last name of the person who married Olga Michailoff?