Complex sentence: After Boeing secured the contract to design and build the DARPA XS-1 reusable spaceplane, the company, in partnership with Blue Origin, is expected to consider a modified derivative of the BE- 4 to provide power for the craft.
Split into simpler sentences: After Boeing secured the contract to design and build the DARPA XS-1 reusable spaceplane. The company, in partnership with Blue Origin, is expected to consider a modified derivative of the BE- 4 to provide power for the craft.