%%
foo:
bar_42:
$@1:
%%

----------------------------------------------------

[
	["bison", [
		["punctuation", "%%"],
		["property", "foo"], ["punctuation", ":"],
		["property", "bar_42"], ["punctuation", ":"],
		["property", "$@1"], ["punctuation", ":"],
		["punctuation", "%%"]
	]]
]

----------------------------------------------------

Checks for properties.