the city's flag
... that American Atheists unsuccessfully sued the city of Austin, Texas, because they believed the city's flag violated the First Amendment?
... that <a href="./American_Atheists" id="mwCIE" rel="mw:WikiLink" title="American Atheists">American Atheists</a> unsuccessfully sued the city of <a href="./Austin,_Texas" id="mwCII" rel="mw:WikiLink" title="Austin, Texas">Austin, Texas</a>, because they believed <b id="mwCIM"><a class="mw-redirect" href="./Flag_of_Austin" id="mwCIQ" rel="mw:WikiLink" title="Flag of Austin">the city's flag</a></b> violated the <a href="./First_Amendment_to_the_United_States_Constitution" id="mwCIU" rel="mw:WikiLink" title="First Amendment to the United States Constitution">First Amendment</a>?