How to understand this sentence. In 2017, 60,000 people were evacuated as authorities <a href="https://www.cnn.com/2017/09/03/europe/germany-frankfurt-bomb-evacuation/index.html" target="_blank" style="box-sizing: border-box; color: rgb(38, 38, 38); transition: color 0.4s ease 0s; text-decoration-color: rgb(204, 0, 0); font-family: CNN, Helvetica, Arial, Utkal, sans-serif; font-size: 16px;">defused a much larger British bomb</a>, a 1.4-ton HC 4000 air mine, that was found at a Frankfurt construction site

I don't understand the word phrase.
 "<a href="https://www.cnn.com/2017/09/03/europe/germany-frankfurt-bomb-evacuation/index.html" target="_blank" style="font-size: 16px; box-sizing: border-box; color: rgb(38, 38, 38); transition: color 0.4s ease 0s; text-decoration-color: rgb(204, 0, 0); font-family: CNN, Helvetica, Arial, Utkal, sans-serif;">defused a much larger British bomb</a>"

Help me please
Thanks a lot