Utilize the input text as a context reference, choose the right relationship between 'Zenefits' and 'Parker Conrad' from the options.
Options: distribution format, owner of, product/material produced, chief executive officer

The startup already has more than 10,000 small business customers, serving over 100,000 total employees in 48 states.“Zenefits’ mission is to make it effortless for small businesses to manage their companies and employees," Zenefits cofounder and CEO Parker Conrad said in a statement.
chief executive officer