Complex sentence: Archaically, it may also be referred to as "The Letter Q" referring to an older method of cataloging Haydn's symphonic output.It is so called because Haydn conducted it at a ceremony in 1791 in which he was awarded an honorary doctorate by Oxford University.
Split into simpler sentences: Archaically, it may also be referred to as "The Letter Q" referring to an older method of cataloging Haydn's symphonic output. The symphony is called the "Oxford" because Haydn conducted it at a ceremony in 1791 in which he was awarded an honorary doctorate by Oxford University.