Complex sentence: However, the firm ran into financial difficulties during the recession which followed the Panic of 1907, which were compounded when it experienced a fire in its factory on 26th Street in December 1910.
Split into simpler sentences: However, the firm ran into financial difficulties during the recession which followed the Panic of 1907. The firm's financial difficulties were compounded when it experienced a fire in its factory on 26th Street in December 1910.