Occupational Safety and Health Administration Logs

what is the subordinate clause in this sentence?

In a study of work environments, the Occupational Safety and Health Administration found that one worker in four is exposed to hazardous conditions.

Public Comments

1. "Hazardous Conditions" is subordinate clause. It is subordinate (result of) to study of work environments, done by O.S.H.A.
2. "In a study of work environments" I believe. Although, keeping with the Holiday theme, the Suboridinate Clause could also be Mrs. Clause ... if Santa is lucky.