Extract properties and values of all datasets from the LOD cloud

I would like to know if there exists some work that is able to extract all
properties and values from entities from all datasets of the whole LOD
cloud (https://lod-cloud.net/)?

Example: I would like to extract all properties and values from all cities
from all datasets of the whole LOD cloud.

Example of problem: Ontology alignment, example, city in DBpedia is
represented by (http://dbpedia.org/ontology/City) but wikidata, city is (
https://www.wikidata.org/wiki/Q515).

Thanks in advance,

André Valdestilhas