Assertion: caster | /r/HasProperty | alpha geminorum
Facets:
Source sentences:
text: The brothers became the two brightest stars in the constellation Gemini ("the twins"): Castor (Alpha Geminorum) and Pollux (Beta Geminorum).
text: It appears to lie on its side as a long rectangle with the stars Castor (alpha Gemini) and Pollux (beta Gemini) on the left.
text: Castor, Alpha Geminorum (α Gem), is a sextuple star system located in the constellation Gemini.