Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to use a fire extinguisher [title] Instruct someone to call the fire department or call them yourself. [step] Evacuate everybody from the building first. Tell somebody to call the fire department or emergency services once that person is safely outside.

Ending1: Below this section is a list of fire extinguisher numbers which you must call and from there, call hotlines to evacuate the building. [title] Alert officials to evacuate the building in an emergency. Ending2: Even if you're able to extinguish the fire on your own, it's best to have the fire department on the way in case something happens. [substeps] When the fire department arrives, they can check that the fire has been extinguished properly. Ending3: If you tell anyone else with a fire extinguisher to call the fire department, they probably won't listen! [title] Know when to use it. [step] Avoid using the extinguisher if your building is particularly large. Ending4: [title] Extinguish any flare-ups. [step] If a flare-up occurs, or if the entire building goes pyroclastic (fire), do not attempt to extinguish the flare-ups.

Answer format: ending1/ending2/ending3/ending4