Complex sentence: In April 1935 at a conference of maritime unions in Seattle, an umbrella union was established to represent the membership of the ISU as well as maritime officers and longshoremen, which was named the Maritime Federation, Harry Lundeberg was named its first president.
Split into simpler sentences: In April 1935 at a conference of maritime unions in Seattle, an umbrella union was established to represent the membership of the ISU as well as maritime officers and longshoremen. Called the Maritime Federation, Harry Lundeberg was named its first president.