Sentence:  The <WSD>"canary</WSD>" bond is unique in that it is callable during the period before the security converts to a noncallable or bullet structure; the <WSD>canary</WSD> callable coupon can possess a step-up feature. 
Meaning of the word marked with <WSD> tags:  (of an option) Can be exercised on quarterly dates, a set time period (usually one year) after the issue date, and before the expiry date.