Once you open http://localhost:7474, try these commands on the
database created in example 3.


-Some queries using Cypher query language
 - match (person: man) return person.name;
 - match (person: woman) return person.name;	
 - match person where person:man or person:woman return person.name;
 - match person-[:USES]-language where language.name = 'Java' return person.name;
 - match person-[:LEARNING]-language where language.name = 'Java' return person.name;
 - match person-[rel]-(lang:language) where person:man or person.woman return person.name, type(rel), lang.name;
 - match person-[rel]-(lang:language) where person:man or person.woman return person.name, type(rel), lang.name order by person.name;
 - people who are using java area also learning:
 	-match (person)-[:USES]->(language {name: 'Java'}) where person:man or person:woman
	match (person)-[:LEARNING]->learningLang
	return person.name as `Java user`, learningLang.name as learning
	-Those learning scala can get help from
	  - match (person)-[:LEARNING]->(language {name: "Scala"})<-[:USES]-(scalaUser) return person.name as `Scala learner`, scalaUser.name as `can get help from`
