    &lt;NA&gt;</span></span>
<span><span class="co">#&gt;    eventDate year month day eventTime institution samplingPurpose</span></span>
<span><span class="co">#&gt; 1 1979-06-05 1979     6   5     10:30        NIWA            &lt;NA&gt;</span></span>
<span><span class="co">#&gt; 2 1979-06-05 1979     6   5     10:30        NIWA            &lt;NA&gt;</span></span>
<span><span class="co">#&gt; 3 1979-06-05 1979     6   5     10:30        NIWA            &lt;NA&gt;</span></span>
<span><span class="co">#&gt; 