source: In 1930, he continued his career in the International Marine Radio Company, where he became a director, finally retired from the company in 1950.
target: In 1930, he continued his career in the International Marine Radio Company.  He became a director.  He finally retired from the company in 1950.
references: In 1930, he continued his career in the International Marine Radio Company.  He became a director.  He finally retired from the company in 1950.