Generate a mapping of mid-level WikiProject categories to the WikiProjects contained in them as dictated by https://en.wikipedia.org/wiki/Wikipedia:WikiProject_Council/Directory
Something like-
"Language and literature": [
"Wikipedia:WikiProject Linguistics",
"Wikipedia:WikiProject Anthroponymy",
"Wikipedia:WikiProject Classical Tamil",
"Wikipedia:WikiProject Constructed languages",
"Wikipedia:WikiProject Deaf",
"Wikipedia:WikiProject Dravidian languages",
.
.
.