generate institution `acronym` from `homepage`

[VladimirAlexiev]

(Followup of #105)
This query

PREFIX dbprop: <https://dbpedia.org/property/>
PREFIX soa: <https://semopenalex.org/ontology/>
select (count(?x) as ?institutions) (count(?page) as ?pages) (count(?acro) as ?acronyms) {
  ?x a soa:Institution
  optional {?x <http://xmlns.com/foaf/0.1/homepage> ?page}
  optional {?x dbprop:acronym ?acro}
}

shows SOA has 111k Instutitutions, 109k homepages, but only 47k acronyms.

I don't know whether there are official rules on how acronyms are formed:
But looking at the values of homepages, it seems quite feasible to extract good acronyms from them.

You need to find the "business-meaningful" word from the homepage URL

• eg "www" and "edu" and "fr" are not business-meaningful.
• that will depend a bit on TLD (i.e. country)