Add my sister to this call
[IN:UPDATE_CALL [SL:CONTACT_ADDED [IN:GET_CONTACT [SL:CONTACT_RELATED my ] [SL:TYPE_RELATION sister ] ] ] ]
Add my sister to this call
[IN:UPDATE_CALL [SL:CONTACT_ADDED [IN:GET_CONTACT [SL:CONTACT_RELATED my ] [SL:TYPE_RELATION sister ] ] ] ]