Assertion: rocket's stage | /r/ObjectUse | used as second stage
Facets:
value: for the c-ib
type: TRANSITIVE-OBJECT
Source sentences:
text: The S-IVB third stage would be used as the second stage for the C-IB, which would serve both to demonstrate proof of concept and feasibility for the C-5, but would also provide flight data critical to development of the C-5.