Use Javascript to get the Sentence of a Clicked Word

You first would have to split your paragraph into elements, as you can't (easily) detect clicks on text without elements :

$('p').each(function() {
    $(this).html($(this).text().split(/([\.\?!])(?= )/).map(
      function(v){return '<span class=sentence>'+v+'</span>'}
   ));
});

Note that it splits correctly paragraphs like this one :

<p>I love cats! Dogs are fine too... Here's a number : 3.4. Please apply here</p>​

Then you would bind the click :

$('.sentence').click(function(){
    alert($(this).text());
});

Demonstration

I don't know if in English : is a separator between sentences. If so, it can be added to the regex of course.