{"id": 1, "type": "join", "person": "Alice", "team": "Alpha"}
{"id": 2, "type": "join", "person": "Bob", "team": "Alpha"}
{"id": 3, "type": "join", "person": "Carol", "team": "Beta"}
{"id": 4, "type": "join", "person": "Dave", "team": "Beta"}
{"id": 5, "type": "join", "person": "Eve", "team": "Gamma"}
{"id": 6, "type": "join", "person": "Frank", "team": "Gamma"}
{"id": 7, "type": "promote", "person": "Alice", "team": "Alpha"}
{"id": 8, "type": "promote", "person": "Carol", "team": "Beta"}
{"id": 9, "type": "join", "person": "Grace", "team": "Delta"}
{"id": 10, "type": "promote", "person": "Eve", "team": "Gamma"}
{"id": 11, "type": "leave", "person": "Bob", "team": "Alpha"}
{"id": 12, "type": "join", "person": "Bob", "team": "Beta"}
{"id": 13, "type": "merge", "source_team": "Gamma", "target_team": "Alpha"}
{"id": 14, "type": "promote", "person": "Frank", "team": "Alpha"}
{"id": 15, "type": "leave", "person": "Dave", "team": "Beta"}
{"id": 16, "type": "join", "person": "Dave", "team": "Delta"}
{"id": 17, "type": "promote", "person": "Grace", "team": "Delta"}
{"id": 18, "type": "merge", "source_team": "Beta", "target_team": "Delta"}
{"id": 19, "type": "leave", "person": "Eve", "team": "Alpha"}
{"id": 20, "type": "join", "person": "Eve", "team": "Delta"}
