Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: A UFO was spotted hovering over a sweltering city - but it turned out to be just a cloud. Keen alien-spotters headed online after seeing what looked like a flying saucer towering over Dublin, Ireland on Tuesday morning. But true believers were left disappointed after it only turned out to be an extra-terrestrial-shaped cloud. Student Carla Whelan, 18, posted shots of the martian shaped fluffy cloud. Her search for an answer was found, with the object being identified as a possible lenticular cloud, according to the Met Office, and not the sign of an impending invasion. The clouds form after rushing, moist air runs straight into a mountain and is forced upwards before condensing on the downward slope.Student Carla Whelan, 18, posted shots of the mysterious martian cloudIt looked like a flying saucer was going to invade Dublin, IrelandThe Met Office has said it is a lenticular cloud and not an alien invasion 
 Question:Colly Murray added: 'Strange looking cloud about _ this morning £ufo.

Dublin