Table:
text: Papal conclave, 1378
Cardinal electors
Cardinal electors
Elector Nationality Cardinalatial_order_and_title Elevated Elevator
Hugues de Montelais, le jeune French Cardinal-priest of Ss. IV Coronati 1375, December 20 Gregory XI
Gui de Maillesec French Cardinal-priest of S. Croce in Gerusalemme 1375, December 20 Gregory XI
Pierre de Sortenac French Cardinal-priest of S. Lorenzo in Lucina 1375, December 20 Gregory XI
Gérard du Puy , O.S.B. French Cardinal-priest of S. Clemente 1375, December 20 Gregory XI
Giacomo Orsini Roman Cardinal-deacon of S. Giorgio in Velabro 1371, May 30 Gregory XI
Pierre Flandrin French Cardinal-deacon of S. Eustachio 1371, May 30 Gregory XI
Guillaume Noellet French Cardinal-deacon of S. Angelo in Pescheria 1371, May 30 Gregory XI

Question: When was cardinal-deacon raised by S. Giorgio in Velabros cardinal electors at the papal conclave, 1378?