Node-Set:

Node value: "classical"

Node value: "classical"

Single Node:

Node value: "classical"

Node-set count is: 2

Union count is: 2

count(union) - count(node-set) is: 0

Node-Set:

Node value: "classical"

Node value: "classical"

Single Node:

Node value: "classical"

Node-set count is: 2

Union count is: 2

count(union) - count(node-set) is: 0