Question:
Which team did Gilbert Dussier play for in May, 1968?

Context:
 Gilbert Dussier plays for K.R.C. Genk from Jan, 1978 to Jan, 1979. 
 Gilbert Dussier plays for FC Differdange 03 from Jan, 1967 to Jan, 1973. 
 Gilbert Dussier plays for A.S. Nancy-Lorraine from Jan, 1975 to Jan, 1977. 
 Gilbert Dussier plays for FA Red Boys Differdange from Jan, 1967 to Jan, 1973. 
 Gilbert Dussier plays for K. Waterschei S.V. Thor Genk from Jan, 1978 to Jan, 1979. 
 Gilbert Dussier plays for Lille OSC from Jan, 1977 to Jan, 1978. 
 Gilbert Dussier plays for Jeunesse Esch from Jan, 1973 to Jan, 1974. 
 Gilbert Dussier plays for Luxembourg national football team from Jan, 1971 to Jan, 1978.

Answer:
FC Differdange 03