Assertion: bicycle's seat | /r/HasProperty | straddled by the operator
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Source sentences:
text: An all-terrain vehicle (ATV), also known as a quad (bike), three-wheeler, four-track, four-wheeler, or quadricycle, as defined by the American National Standards Institute (ANSI) is a vehicle that travels on low-pressure tires, with a seat that is straddled by the operator, along with handlebars for steering control.