Were M0 and M3 influenced by M1 and influenced by M2
SELECT count(*) WHERE {
M0 ns:influence.influence_node.influenced_by M1 .
M0 ns:influence.influence_node.influenced_by M2 .
M3 ns:influence.influence_node.influenced_by M1 .
M3 ns:influence.influence_node.influenced_by M2
}