official diplomatic relations
... that Sweden established official diplomatic relations with Guinea-Bissau before Guinea-Bissau formally gained independence from Portugal in 1974?
... that <a href="./Sweden" id="mwEjU" rel="mw:WikiLink" title="Sweden">Sweden</a> established <b id="mwEjY"><a href="./Guinea-Bissau–Sweden_relations" id="mwEjc" rel="mw:WikiLink" title="Guinea-Bissau–Sweden relations">official diplomatic relations</a></b> with <a href="./Guinea-Bissau" id="mwEjg" rel="mw:WikiLink" title="Guinea-Bissau">Guinea-Bissau</a> before Guinea-Bissau formally gained <a href="./Guinea-Bissau_War_of_Independence" id="mwEjk" rel="mw:WikiLink" title="Guinea-Bissau War of Independence">independence from Portugal</a> in 1974?