e-number="3"><span class="co">##  [7] "chemical_class"     "taxa"               "trophic_lvl"       </span></a>
<a class="sourceLine" id="cb3-4" data-line-number="4"><span class="co">## [10] "habitat"            "region"             "ecotox_grp"        </span></a>
<a class="sourceLine" id="cb3-5" data-line-number="5"><span class="co">## [13] "duration"           "effect"             "endpoint"          </span></a>
<a class="sourceLine" id="cb3-6" data-line-number="6"><span class="co">## [16] "exposure"</spa