He served a second time as a Green Party faction member of the 11th German parliament from 1987 to 1990 .
He was a member of the Bundestag until March 31 , 1985 , when he left his seat , following the principal of rotation in office .
member served a second time as a Green Party faction member of the 11th German parliament from 1987 to 1990 .
He was a member of the Bundestag until March 31 , 1985 , when he left his seat , following the principal of rotation in office .