(n1 {Person} [ name: "Alice", age: 23 ])
(n2 {Person, Student} [ name: "Bob" ])
(n3 {Course} [ name: "Algebra" ])
(n1) -(e1 {knows} [ since: 2020 ])->(n2)
(n2)-(e2 {knows} [ start: 2024, end: 2025 ])->(n3)
