Original sentence: He has also been nominated twice for the Sidewise Award for Best Alternate History Short Form, which he won in 2004 with his story "O One".Hw won the Sidewise Award for Best Alternate History Long Form in 2009 for The Dragon's Nine Sons
Edited sentence: He has also been nominated twice for the Sidewise Award for Alternate History Short Form, which he won in 2004 with his story "O One".Hw won the Sidewise Award for Alternate History Long Form in 2009 for The Dragon's Nine Sons