| 21. | The blast came more than half an hour after one warning call to The Associated Press office.
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| 22. | On some occasions the attacks have been preceded by warning calls to allow Palestinians to take cover.
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| 23. | In a practice codenamed roof knocking, the IDF issued warning calls before air strikes on civilian buildings.
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| 24. | The blast was preceded by an anonymous warning call from someone who sounded like a white American male.
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| 25. | A drought warning calls for local officials to increase pressure to conserve _ but without instituting mandatory measures.
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| 26. | A warning call minutes before helped police avert a catastrophe by evacuating the building and cordoning off entrances.
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| 27. | That hideous warning call that golfers hate to utter and hope not to hear is welcomed these days.
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| 28. | Police said a warning call received at the Leeds General Infirmary was not accompanied by a code word.
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| 29. | Police said they received a warning call an hour before the blast by someone claiming to represent ETA.
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| 30. | He collaborated with Warning Call ".
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