In the context of the input sentence, determine the relationship between 'Boeing' and 'Dennis Muilenburg'.
Options: chief executive officer, brand, original broadcaster, product/material produced

But, with Alibaba's Jack Ma sitting on his left and Boeing (NYSE: BA - news ) chief Dennis Muilenburg to his right, Xi also pushed for some quid pro quo from his American hosts to help Chinese firms expand in the United States.
chief executive officer