data.json

{
  "nodes": [
  	{"name": "HS Chem", "id": "HSchem", "group": 1},
    {"name": "CHEM 1A", "id": "Chem1a", "group": 2},
    {"name": "CHEM 1AL", "id": "Chem1al", "group": 3},
    {"name": "CHEM 1B", "id": "Chem1b", "group": 2},
    {"name": "CHEM 3A", "id": "Chem3a", "group": 2},
    {"name": "CHEM 3AL", "id": "Chem3al", "group": 3},
    {"name": "CHEM 3B", "id": "Chem3b", "group": 2},
    {"name": "CHEM 3BL", "id": "Chem3bl", "group": 3},
    {"name": "CHEM 4A", "id": "Chem4a", "group": 2},
    {"name": "CHEM 4B", "id": "Chem4b", "group": 2},
    {"name": "CHEM 12A", "id": "Chem12a", "group": 2},
    {"name": "CHEM 12B", "id": "Chem12b", "group": 2}
  ],
  "links": [
    {"source": "HSchem", "target": "Chem1a", "value": 64},
    {"source": "HSchem", "target": "Chem4a", "value": 64},
    {"source": "HSchem", "target": "Chem4b", "value": 64},    
    {"source": "HSchem", "target": "Chem1al", "value": 64},
    {"source": "Chem1a", "target": "Chem1al", "value": 64},
    {"source": "Chem1al", "target": "Chem1a", "value": 64},
    {"source": "Chem1a", "target": "Chem1b", "value": 64},
    {"source": "Chem1a", "target": "Chem3a", "value": 64},
    {"source": "Chem1a", "target": "Chem3al", "value": 64},
    {"source": "Chem1al", "target": "Chem1b", "value": 64},
    {"source": "Chem1al", "target": "Chem3al", "value": 64},
    {"source": "Chem3a", "target": "Chem3b", "value": 64},
    {"source": "Chem3b", "target": "Chem3bl", "value": 64},
    {"source": "Chem3bl", "target": "Chem3b", "value": 64},
    {"source": "Chem3al", "target": "Chem3bl", "value": 64},
    {"source": "Chem1b", "target": "Chem12a", "value": 64},
    {"source": "Chem4b", "target": "Chem12a", "value": 64},
    {"source": "Chem12a", "target": "Chem12b", "value": 64}
  ]
}