Message mom and grandma and tell them I will be there in 5 minutes.
[IN:SEND_MESSAGE Message [SL:RECIPIENT [IN:GET_CONTACT [SL:TYPE_RELATION mom ] ] ] and [SL:RECIPIENT [IN:GET_CONTACT [SL:TYPE_RELATION grandma ] ] ] and tell them [SL:CONTENT_EXACT I will be there in 5 minutes ] . ]