1.   Tags have all these functions and more, and only the context can narrow the field in any specific case.

2.   The Lords of the Rings will narrow the field to four, then pick one next year.

3.   Voice over A register of known offenders would narrow the field.

4.   We have already narrowed the field significantly by looking at cassette formats.

5.   A register of known offenders would narrow the field.

6.   Although the Texas primary is only two weeks away, the jumble of election contests before then could narrow the field.

7.   An anonymous committee narrowed the field further.

8.   Autistic children have narrowed fields of attention and a poor ability to recognize faces.