An OPM Branch Chief who supervises the cross-trained claims processing team implemented a 360-degree feedback system for assessing both her and her team members' performance.
The Branch Chief implemented a 360-degree feedback system. 
mnli hypothesis: The Branch Chief implemented a 360-degree feedback system.  premise: An OPM Branch Chief who supervises the cross-trained claims processing team implemented a 360-degree feedback system for assessing both her and her team members' performance.