1.   Abel was blunt on the air and sometimes angered management with his tart observations.

2.   But when it comes to tart political observations he remains a class act.

3.   In the meantime there are enough tart observations to keep it vivid as a running commentary, which is perhaps its true purpose after all.

4.   Over leisurely, teasing grooves, Ms. Badu sings in a sweet-and-sour voice, wandering between Afrocentric mysticism and tart urban observations.

5.   Quoting Communist Party classics, Wei, ever full of subtle suggestions and tart political observation, identified and made fun of the defects in authoritarian rule.