Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

“One of the key elements of our strategic planning is to secure and extend our core defense business and we feel confident that the addition of Sikorksy will contribute significantly to the growth objective,” Lockheed Martin CEO Marillyn Hewson said during a conference call.

Answer: chief_executive_officer: Lockheed Martin, Marillyn Hewson; director_/_manager: Lockheed Martin, Marillyn Hewson