Assertion: engine | /r/HasAspect | piston
Facets:
Source sentences:
text: Most 6-cylinder engines have pistons that are aligned in a 'V' formation.
text: If you have read How Car Engines Work, you know that your engine has pistons, and the pistons move up and down in their cylinders:
text: While 4-cylinder engines have the pistons arranged in a line, 6-cylinder engines usually have them arranged in a V shape.