Complex sentence: On 23 April 1972, Wilhelm Helms (FDP) left the coalition; the FDP politicians Knud von Kühlmann-Stumm and Gerhard Kienbaum also declared that they would vote against Brandt; thus, Brandt had lost his majority.
Split into simpler sentences: On 23 April 1972, Wilhelm Helms (FDP) left the coalition. The FDP politicians Knud von Kühlmann-Stumm and Gerhard Kienbaum also declared that they would vote against Brandt; thus, Brandt had lost his majority.