Complex sentence: On January 15,1902, Graham held the first meeting of the agriculture experiment club in the basement of the Clark County Post Office in Springfield, Ohio (now called the A. B. Graham building).
Split into simpler sentences: On January 15,1902, Graham started the first meeting of the agriculture experiment club. This meeting was held in the basement Clark County Post Office in Springfield, Ohio (now called the A. B. Grahm building).