You can do that quite easily with the enumitem
package and an enumerate
environment:
\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\setlength{\parindent}{0cm}
\usepackage[shortlabels]{enumitem}
\usepackage{lipsum}
\begin{document}
\lipsum[11]
\begin{enumerate}[label=UR-\arabic*., font=\bfseries, wide= 0pt, leftmargin=2em]
\item Some text, some text, , some text, some text, , some text, some text, some text, some text, some text.
\item Some more text, some more text, some more text, some more text, some more text, some more text, some more text, some more text, some more text, some more text.
\end{enumerate}
\end{document}
