Assertion: lawn mower's blade | /r/CapableOf | need sharpening every 5-10 years
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Source sentences:
text: The folks at Fiskars have taken the old manual reel mower design and updated it for the 21st century: it’s 60% easier to push than other manual mowers, boasts twice the cutting power of competitors, sprays the grass out in front of you, and the blades only need sharpening every 5-10 years