How to give breakdown of text prediction sentences in Shiny
Maybe you could put the sentences in a dataframe and used renderTable, something like this:
server &lt;- function(input, output, session) {
  sentences &lt;- reactive({
    data.frame(sentences=make_sentences(input$inputString))
  })
  output$prediction &lt;- renderTable(sentences())
}


[edit]
In order to only have them line by line something like this might work:
server &lt;- function(input, output, session) {
  sentences &lt;- reactive({
    paste(make_sentences(input$inputString),sep='&lt;br/&gt;')
  })
  output$prediction &lt;- renderTable(sentences())
}

Alternatively you could have a numbered list by using the corresponding HTML tags: insert the whole list inside &lt;ol&gt; ... &lt;/ol&gt; and every sentence in a &lt;li&gt; .. &lt;/li&gt;.