prompt: Produce a sentence which has a cefr level of "c1" and starts with: "realizing that collective".
label: Realizing that collective Security Council action to prevent the forceful frustration of partition had become most improbable, the Arab states inferred that armed intervention could be achieved with impunity and, perhaps, even with the blessings of Britain which had been actively obstructing all efforts at orderly and gradual transition of power.