<Tr> <Td> Bolivia </Td> <Td> 4--0 </Td> <Td> </Td> <Td> Bek (2), Marjanović, Vujadinović </Td> </Tr> <Tr> <Td> Semi-final </Td> <Td> Uruguay </Td> <Td> 1--6 </Td> <Td> </Td> <Td> Vujadinović </Td> </Tr> <Tr> <Td_colspan="6"> 000as SFR Yugoslavia (1950--1990) </Td> </Tr> <Tr> <Td> 1950 </Td> <Td> Group stage </Td> <Td> Switzerland </Td> <Td> 3--0 </Td> <Td> </Td> <Td> Mitić, Tomašević, Ognjanov </Td> </Tr>

How many times have serbia been in the world cup