["activities",
["work", ["cs", 5], ["chem", 12]], ["play", ["soccer", 3], ["pool", 2], ["nintendo", 1]], "sleep"]
["work", ["cs", 5], ["chem", 12]],
["play", ["soccer", 3], ["pool", 2], ["nintendo", 1]],
"sleep"]
Nesting structure may be visualized using various tree diagrams.
One such:
Labeled tree