Was M5 a person whose employer acquired M0 , M1 , M2 , M3 , and M4
SELECT count(*) WHERE {
?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M0 .
?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M1 .
?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M2 .
?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M3 .
?x0 ns:organization.organization.companies_acquired/ns:business.acquisition.company_acquired M4 .
M5 a ns:people.person .
M5 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0
}