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\begin{document}
\begin{tabular}{c|cccc}
\hline
Sample & $\rm{I}$ & $\rm{II}$ & $\rm{III}$ &$\rm{IV}$\\
\hline  
Yields & 256\,466$\pm$629 & 246\,629$\pm$519 & 258\,274$\pm$574 & 246\,986$\pm$607\\
\hline  
\end{tabular}
\end{document}
