Splitting a float that isn't a table

[Duncan Hothersall <dh@capdm.com>]

I define a floating block called Exhibit

\definefloat[Exhibit][table]

which just contains paragraphs of text. I'd like to be able to split it
using the \splitfloat mechanism but that only seems to work if the
content of the float is a table, not paragraphs.

----
\definefloat[Exhibit][table]
\starttext
\input tufte\par
\splitfloat[lines=auto]{\placeExhibit{Knuth}}
{\dorecurse{4}{\input knuth \par}}
\input tufte\page[yes]
\stoptext
----

This outputs "there is nothing to split" in the resultant PDF.

Is there any way to achieve the equivalent of

----
\definefloat[Exhibit][table]
\starttext
\input tufte\par
\splitfloat[lines=auto]{\placeExhibit{Knuth}}
{\bTABLE[frame=off]\dorecurse{4}{\bTR\bTD\input knuth \eTD\eTR}
\eTABLE}
\input tufte\page[yes]
\stoptext
----

without having to make every paragraph a table cell?

Thanks in advance.

Duncan