Task: Text Simplification
Input (English): in 1967 , he became chairman of the spd fraction in the landtag , and in 1970 minister of science and education in the cabinet of minister president heinz kühn.
Output (English): in 1967 , he became the head of the spd group in the landtag , and in 1970 he became minister of science and education in the government of minister president heinz kuhn.