Premise: Gianluca Cologna (born 17 May 1990) is a Swiss cross-country skier. His brother Dario Cologna is also a professional cross-country skier. He competed in the 2014 Winter Olympics in the Men's team sprint with his brother Dario and finished 5th in the final.
Hypothesis: Gianluca and Dario Cologna have a sister named Emily.