1.   If a mass is detected in the mammogram, then the doctor usually has a biopsy performed to see if it is cancerous.

2.   In Moscow, Joseph Stalin, the Soviet leader, advised that an autopsy be performed to see if Roosevelt had been poisoned.

3.   Specifically, she came hoping to work with Meredith Monk, a multidisciplinary artist she had read about but had never met or seen perform.

4.   Young children learn to perform in order to see dancing ducks or shoot trash from space, activities that diminish the importance of the task itself.