Complex sentence: On 22 February 1973, the Dutch government officially created a specialist counter-terrorism unit in response to the Munich massacre, when 11 Israeli athletes were murdered by Palestine pro-Fatah militants.
Split into simpler sentences: On 22 February 1973, the Dutch government officially created a specialist counter-terrorism unit. The reason was the Munich massacre, when 11 Israeli athletes were murdered by Palestine pro-Fatah militants.