The competition ended. It ran from April 24th to May 8th, 2018.
The winners will now be picked and the and the most successful ambassador determined. They will be informed via e-mail.
The correct solution is:
"Research is based on reliable information"
Win prizes of 500 € in total:
1st prize: 300 €
2nd prize: 150 €
3rd prize: 50 €
The most successful ambassador wins: 50 €