question: Why does water increase lamp darkening ?
answer: The oxygen attacks the tungsten metal , and the resulting tungsten oxide particles travel to cooler parts of the lamp .
turker_answer: Water increases lamp darkening because the oxygen attacks the tungsten metal , and the resulting tungsten oxide particles travel to cooler parts of the lamp .
rule-based: Water increase lamp darkens because the oxygen attacks the tungsten metal , and the resulting tungsten oxide particles travel to cooler parts of the lamp .