erDiagram
  PERSON ||--o{ ADDRESS : lives_at
  PERSON {
    string name PK
  }
  ADDRESS {
    string street
    string city
  }
---
+----------------+      +------------------+
| PERSON         |      | ADDRESS          |
+----------------+|---o<+------------------+
| PK string name |lives_|    string street |
+----------------+      |    string city   |
                        +------------------+