Bolivia-Chile relations
...that Bolivia-Chile relations have been strained due to a border dispute unresolved since the 19th century?
...that <b id="mwEAQ"><a class="mw-redirect" href="./Bolivia-Chile_relations" id="mwEAU" rel="mw:WikiLink" title="Bolivia-Chile relations">Bolivia-Chile relations</a></b> have been strained due to a <a class="mw-redirect" href="./Atacama_border_dispute" id="mwEAY" rel="mw:WikiLink" title="Atacama border dispute">border dispute</a> unresolved since the 19th century?