TTS DAISY Pipeline generation - gap between sentences

[torchtrust]

Hi,
I am back on the TTs engine in DAISY pipeline again. I can control the gap between the paragraphs and headings using css:
h1 { pause-before: 1500ms; volume: x-loud }
h2 { pause-before: 1000ms; volume: loud }
book {speech-rate: -12% }
p { pause-after: 1100ms }
p.quotation { pitch: high }

but can we control the gap between sentences? is it fixed at 1 second? I am finding it a little long and I would like to reduce it so the speech flows more naturally.
Thanks
Paul