Complex sentence: Sikorsky entered the VH-92 variant of the S-92 into the VXX competition for U.S. Presidential helicopter Marine One, but lost to the VH-71 Kestrel.
Split into simpler sentences: Sikorsky entered the VH-92 variant of the S-92 into the VXX competition. The VH-92 lost the competition to the VH-71 Kestrel.