Complex sentence: After Hännikäinen's Liiga team, JYP Jyväskylä was eliminated from the playoffs by Oulun Kärpät it was announced on April 20th, 2015 that Hännikäinen had signed a two-year entry level contract with the Columbus Blue Jackets.
Split into simpler sentences: After Hännikäinen's Liiga team, JYP Jyväskylä was eliminated from the playoffs by Oulun Kärpät. On April 20,2015 it was announced that Hännikäinen signed a two-year entry level contract with the Columbus Blue Jackets.