Is there Rain in grandma house? 
[IN:GET_WEATHER Is there [SL:WEATHER_ATTRIBUTE Rain ] in [SL:LOCATION [IN:UNSUPPORTED_PEOPLE grandma house ] ] ] ?  ]
[IN:GET_WEATHER Is there [SL:WEATHER_ATTRIBUTE Rain ] in [SL:LOCATION [IN:UNSUPPORTED_PEOPLE grandma house ] ] ] ?  ]