Account for LaTeX-based symbols

[paulalbert1]

The abstract of this publications has LaTeX-based symbols in its title and abstract.
https://www.ncbi.nlm.nih.gov/pubmed/31031568

            <ArticleTitle>Measurement of the top quark mass in the all-jets final state at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
                    <mml:mrow>
                        <mml:msqrt>
                            <mml:mi>s</mml:mi>
                        </mml:msqrt>
                        <mml:mo>=</mml:mo>
                        <mml:mn>13</mml:mn>
                        <mml:mspace/>
                        <mml:mtext>TeV</mml:mtext>
                    </mml:mrow>
                </mml:math> and combination with the lepton+jets channel.</ArticleTitle>

I have no idea how, at this point, but we should figure out a way for dealing with these.