Complex sentence: Born Winifred June Vlasek in Minneapolis, Minnesota, she originally trained as a dancer, and made her first film appearance in 1932 and gradually began to secure second lead roles in mostly "B" pictures.
Split into simpler sentences: Born Winifred June Vlasek in Minneapolis, Minnesota, she originally trained as a dancer. She made her film debut in 1932 and gradually began to secure second lead roles in mostly "B" pictures.