[NTG-context] How to keep nested itemize group together with parent itemize item?

I have a nested itemize list like this, with first a question, then answer: \starttext \startitemize[n]    \startitem What is the color of the sky? \stopitem    \startitemize[3]        \startitem blue \stopitem        \startitem green \stopitem         \startitem red \stopitem         \startitem yellow \stopitem     \stopitemize    \startitem What is the color of the grass? \stopitem    \startitemize[3]        \startitem blue \stopitem        \startitem green \stopitem         \startitem red \stopitem         \startitem yellow \stopitem     \stopitemize    \startitem What is the color of the butterfly? \stopitem    \startitemize[3]        \startitem blue \stopitem        \startitem green \stopitem         \startitem red \stopitem         \startitem yellow \stopitem     \stopitemize \stopitemize \stoptext My copyeditor has noticed that often times a page break will appear after a question, leaving the answers, or some answers on a new page. He's requested I make sure the page breaks can only occur in front of a question, such that if a new page is needed, it places the question and answers always on the same page. Is there any way to make that happen in ConTeXt? --Joel