问题: 镍矿的化学元素是什么？主要用途是什么？
Cypher查询:
match (:ENTITY{name:'镍矿'})-[:Relationship{name:'元素符号'}]->(n) return n.name as name union all match (:ENTITY{name:'镍矿'})-[:Relationship{name:'主要用途'}]->(m) return m.name as name
查询结果:
Ni
用于合金、电镀等