_name</span><span class="special">)</span>
        <span class="special">,</span> <span class="identifier">last_name</span><span class="special">(</span><span class="identifier">last_name</span><span class="special">)</span>
        <span class="special">{}</span>

        <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">first_name</span><span class="special">,</span> <span class="identifier">last_name</span><span class="specia