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

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