Complex sentence: She had a studio at the old Harcourt Building in Boston in 1904, when a severe fire burned the life's work of several artists including Hazelton, Joseph DeCamp, and William M. Paxton.
Split into simpler sentences: She had a studio at the old Harcourt Building in Boston. On 1904, a severe fire at the Harcourt burned the life's work of several artists including Hazelton, Joseph DeCamp, and William M. Paxton.