"AZF factory" . . "AZF chemical plant explosion" . "AZF Factory" . . . . . . "an explosion at a factory" . . . . . "AZF (factory)" . "explosion of the AZF chemical factory" . . "An explosion at the AZF fertilizer factory" . "AZF (factory)" . "AZF" . . . "AZF explosion" . . "AZote Fertilisant" . . "AZF chemical factory explosion" .