\documentclass{article}
\usepackage{feynmf,hepnames}
\begin{document}
\begin{fmffile}{output-from-feynmf}
%% Transformation: fml2fmf.xslt
%% :
\begin{fmfgraph*}(100,100)
\fmfleft{,}
\fmfright{,}
\fmf{,label=}{,,}
\fmfv{label=}{}
\fmfblob{label=}{}
\fmf{,label=}{,}
\end{fmfgraph*}
\end{fmffile}
\end{document}