The phrase "zingende vader van Marga en Chiel" refers to the singing father of Marga and Chiel van Praag. Their father is Max van Praag, a well-known Dutch singer. Marga van Praag is a Dutch journalist and former TV presenter, and Chiel van Praag is a Dutch radio and TV presenter. Both are children of Max van Praag, who was recognized as a significant figure in Dutch music as a singer.
Therefore, the "zingende vader van Marga en Chiel" is Max van Praag.
