11.   It was not clear Sunday evening when they were provided with the license number of the fuel truck, and whether it had yielded any clues.

12.   Most intriguing of all, scientists hope a harvest of Stardust data will yield clues to the origin of life on Earth, and perhaps elsewhere.

13.   Memory tests have yielded some clues about what we remember, and in what order.

14.   Muscle tremors may also yield clues to deceit and can be detected with a body-scanning laser that can pick up heart rate and respiration as well.

15.   The cold granite headstone that bears her name yielded no clues but made me deeply sad.

16.   The freeway itself yielded few clues about the crash.

17.   The metal has yielded no clues to a crime so far, nor has a worldwide investigation turned up any intelligence pointing to a conspiracy to destroy the plane.

18.   The Leahy letter is considered a potentially important piece of evidence that investigators hope will yield clues to the identity of the culprit.

19.   The municipal code yielded no clues, either, he said.

20.   The observations so far have yielded no clues to how the seed black holes originated.