Complex sentence: By 1998 when the girls are recording their third album "FanMail" and they announce in October 1999 that they are going on tour while Tionne later learns she is pregnant with her first child.
Split into simpler sentences: By 1998 when the girls are recording their third album "FanMail". They announce in October 1999 they are going on tour and Tionne later learns she is pregnant with her first child.