Query: Who were Laemmle's business partners in the Yankee Film Company?
Context: Soon, Laemmle and other disgruntled nickelodeon owners decided to avoid paying Edison by producing their own pictures. In June 1909, Laemmle started the Yankee Film Company with partners Abe Stern and Julius Stern. That company quickly evolved into the Independent Moving Pictures Company (IMP), with studios in Fort Lee, New Jersey, where many early films in America's first motion picture industry were produced in the early 20th century.