Complex sentence: Sharman has been wrongly described as "selected by lottery", rather she was subjected to a rigorous selection process that gave weight to scientific, educational, and aerospace backgrounds as well as the ability to learn a foreign language.
Split into simpler sentences: Sharman has been wrongly described as "selected by lottery". She was subjected to a rigorous selection process that gave weight to scientific, educational and aerospace backgrounds as well as the ability to learn a foreign language.