sentences: cellular telescope is a sink of matter for room inactivity
docs: field_glass is refracting_telescope. optical_telescope is astronomical_telescope. coude_telescope is reflecting_telescope. galilean_telescope is refracting_telescope. satellite_facility is unnatural_thing. refracting_telescope is optical_telescope. solar_telescope is telescope. crystal is inanimate_object. reflecting_telescope is optical_telescope. astronomical_object is natural_inanimate_thing.