They recently circulated a petition to help save the valley as a World Heritage Site.

VOA: standard.2010.08.05

You don't have to petition the government to do something.

你不必再去请求政府,出面做什么事情。

普林斯顿公开课 - 人性课程节选

The children presented a petition with 60,000 signatures in support of the law.

VOA: standard.2010.03.27

As for Tabachnyk,Ben says petition drives are being held against him, not just in western Ukraine, but also in Kyiv and such eastern and southern cities as Kharkiv, Kherson,and even Odesa.

VOA: standard.2010.03.17