Assertion: l dwarf | /r/HasProperty | wide-field surveys
Facets:
value: as of 2013
type: TEMPORAL
Source sentences:
text: As of 2013 , over 900 L dwarfs have been identified, most by wide-field surveys: the Two Micron All Sky Survey (2MASS), the Deep Near Infrared Survey of the Southern Sky (DENIS), and the Sloan Digital Sky Survey (SDSS).