\documentclass{scrartcl}

\usepackage{graphics}

\usepackage[output=latex]{plantuml}
% Have sans serif font at each tikz diagram. Source: https://tex.stackexchange.com/a/4888/9075
\tikzstyle{every picture}+=[font=\sffamily]

\begin{document}
\begin{plantuml}
@startuml
class Car

Driver - Car : drives >
Car *- Wheel : have 4 >
Car -- Person : < owns
@enduml
\end{plantuml}
\end{document}