Remind Randy and mom to arrive at 7, alert them 10 mins before.
[IN:CREATE_REMINDER Remind [SL:PERSON_REMINDED Randy ] and [SL:PERSON_REMINDED [IN:GET_CONTACT [SL:TYPE_RELATION mom ] ] ] to [SL:TODO [IN:GET_TODO [SL:TODO arrive ] [SL:DATE_TIME at 7 ] ] ] , alert them [SL:DATE_TIME 10 mins before ] . ]