This question will only resolve in yes or no if he starts the Giro. If van Aert doesn't cross the startline of stage 1 of the Giro d'Italia, this question will be resolved N/A. If you want to bet if he starts, there will be the Giro Starlist market from @eliza linked down below.

He has to finish within the best 5 General Classement riders at the end of the race. 

If the Giro was cancelled early, this question would be resolved accordingly to given UCI points for GC. 