Aerojet Vice President Julie Van Kleeck declined comment on reports that Aerojet has offered $2 billion to acquire United Launch Alliance (ULA), a 50-50 rocket launch venture of Lockheed Martin Corp and Boeing Co.
Analyze the relationship between 'Lockheed Martin' and 'United Launch Alliance' within the context of the input sentence.
Options: product/material produced, location of formation, owner of, subsidiary