-- THIS IS AN EXPERIMENTAL MODULE -- @author RLuts  local p = {}  --Return links to wikipedia and commons category function p.links(frame)         local lang = 'ru'         if mw.title.getCurrentTitle().exists then           local content = string.lower(mw.title.getCurrentTitle():getContent())           local hasWikiLink, hasCommLink                    if string.find(content, "%[%[wikipedia:.*]]") or string.find(content, "{{[Ff]ooter%s*|.*wikipedia%s*=.+}}") then               hasWikiLink = true           end                    if string.find(content, "%[%[commons:.*]]") or string.find(content, "{{[Ff]ooter%s*|.*commons%s*=.+}}") then               hasComLink = true           end                    entity = mw.wikibase.getEntityObject()           if not entity then               return nil           end           if (entity.sitelinks[lang .. "wiki"] and not hasWikiLink) then               wlinks = "[[wikipedia:" .. lang .. ":" .. entity.sitelinks[lang .. "wiki"].title .. "]]\n"           end             if (entity.claims and entity.claims.P373 and not hasComLink and wlinks) then               wlinks = wlinks .. "[[commons:Category:" .. entity.claims.P373[1].mainsnak.datavalue.value .. "]]"           elseif (entity.claims and entity.claims.P373 and not hasComLink and not wlinks) then             wlinks = "[[commons:Category:" .. entity.claims.P373[1].mainsnak.datavalue.value .. "]]"           end             return wlinks       else         return nil       end          end   return p