Assertion: zodiac's sign | /r/HasProperty | fixed to the point
Facets:
value: at the march equinox
type: TEMPORAL
Source sentences:
text: Contemporary use of the coordinate system is presented with the choice of interpreting the system either as sidereal, with the signs fixed to the stellar background, or as tropical, with the signs fixed to the point (vector of the Sun) at the March equinox.