Find the last name of the latest contact individual of the organization "Labour Party".
create table organizations (organization_id varchar, organization_name varchar, PRIMARY KEY (organization_id)); create table individuals (individual_last_name varchar, individual_id varchar, PRIMARY KEY (individual_last_name)); create table organization_contact_individuals (organization_id varchar, individual_id varchar, date_contact_to varchar, PRIMARY KEY (organization_id))
select t3.individual_last_name from organizations as t1 join organization_contact_individuals as t2 on t1.organization_id = t2.organization_id join individuals as t3 on t2.individual_id = t3.individual_id where t1.organization_name = "labour party" order by t2.date_contact_to desc limit 1