Definition: Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.
Input: He was a leading figure in the German political party Alliance '90 / The Greens, and according to opinion polls, he was the most popular politician in Germany for most of the government's duration.

According to opinion polls, he was the most popular politician in Germany and a leading figure in the German Political party Alliance '90/ The Greens.