an> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
        <span class="token keyword">return</span> <span class="token boolean">nil</span><span class="token punctuation">,</span> err
    <span class="token punctuation">}</span>

    <span class="token keyword">return</span> article<span class="token punctuation">,</span> <span class="token boolean">nil</span>
<span class="token punctuation">}</span>

<span class="token keyword">func</span> <span class="token function">FindA