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.

He was a leading figure in the German political party Alliance '90. According to polls, he was the most popular politician in Germany for most of the government's duration.