Complex sentence: In October 1925, Crosby and his partner Al Rinker, brother of singer Mildred Bailey, decided to seek fame in California and they traveled to Los Angeles where they met up with Mildred Bailey.
Split into simpler sentences: In October 1925, Crosby and his partner Al Rinker, brother of singer Mildred Bailey, decided to seek fame in California. They traveled to Los Angeles where they met up with Mildred Bailey.