Assertion: city's wall | /r/HasProperty | perpendicular
Facets:
value: exactly
type: DEGREE
value: to the point on the horizon
type: LOCATION
Source sentences:
text: It is consistently oriented 15 to 25 degrees east of true north, and the front wall of the Pyramid of the Sun is exactly perpendicular to the point on the horizon where the sun sets on the equinoxes.