Was a British person that M2 employed , M3 was founded by , and M4 was founded by M0
SELECT count(*) WHERE {
M0 a ns:people.person .
M0 ns:organization.organization_founder.organizations_founded M3 .
M0 ns:organization.organization_founder.organizations_founded M4 .
M0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
M0 ns:people.person.nationality ns:m.07ssc
}