sentences:  Karhumäki brothers
  
  Niilo and Valto Karhumäki, also known as the Karhumäki brothers (), were Finnish aviation pioneers, aircraft manufacturers and airline founders.Born in Multia, Niilo and Valto Karhumäki moved to Jyväskylä, where they founded a company called "Veljekset Karhumäki" in late 1924, which dealt with pilot training, public displays, aircraft maintenance and aerial photography during the 1930s.