South Korean naval unit
... that a South Korean naval unit defended a North Korean ship against Somali pirates?
... that a <b id="mwEjw"><a href="./Cheonghae_Unit" id="mwEj0" rel="mw:WikiLink" title="Cheonghae Unit">South Korean naval unit</a></b> defended a <a href="./North_Korea" id="mwEj4" rel="mw:WikiLink" title="North Korea">North Korean</a> ship against <a class="mw-redirect" href="./Piracy_in_Somalia" id="mwEj8" rel="mw:WikiLink" title="Piracy in Somalia">Somali pirates</a>?