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.

Can we draw the following conclusion?
Gianluca and Dario Cologna have a sister named Emily.
It's impossible to say