Complex sentence: Oleksiy Oleksiyovych Oliynyk (born June 20,1977; Russified to Alexey Alexeievich Oleinik,) is a Ukrainian-Russian mixed martial artist, jujitsuka, combat sambist and grappler currently signed with the Ultimate Fighting Championship, competing in their Heavyweight division.
Split into simpler sentences: Oleksiy Oleksiyovych Oliynyk (born June 20,1977; Russified to Alexey Alexeievich Oleinik,) is a Ukrainian-Russian mixed martial artist, jujitsuka, combat sambist and grappler. He is signed with the Ultimate Fighting Championship, competing in their Heavyweight division.