Hi Jerrold,
It sounds like you would just need a relevant statement to determine whether a text description would appear or not after selecting 'yes' or 'no'. You can add a text question after the yes/no question and in the relevant column for the text question input
${yesno}='no'
I have attached an XLSForm which demonstrates this method.
Please let me know if this is what you were looking to accomplish.
Best,
Brandon