Remind my sister to pick up my daughter at 2pm; alert 20 minutes beforehand
[IN:CREATE_REMINDER Remind [SL:PERSON_REMINDED [IN:GET_CONTACT [SL:CONTACT_RELATED my ] [SL:TYPE_RELATION sister ] ] ] to [SL:TODO [IN:GET_TODO [SL:TODO pick up my daughter ] [SL:DATE_TIME at 2 pm ] ] ] ; alert [SL:DATE_TIME 20 minutes beforehand ] ]