CREATE TABLE individuals (individual_last_name VARCHAR, individual_id VARCHAR)
CREATE TABLE organizations (organization_id VARCHAR, organization_name VARCHAR)
CREATE TABLE organization_contact_individuals (organization_id VARCHAR, individual_id VARCHAR, date_contact_to VARCHAR)

Find the last name of the latest contact individual of the organization 'Labour Party'.
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
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 "Labour Party" = "t1"."organization_name" ORDER BY "t2"."date_contact_to" DESC NULLS LAST LIMIT 1