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 super-slimming mother and daughter lost a combined 17 stone after they both started dieting on the same day, without either of them knowing about the other. Katie Hunt, 50, from Swadlincote, Derbyshire tipped the scales at 18st while daughter Amber-Jayne, 22, from Edgbaston, Birmingham weighed 19st 11lbs after both met up regularly to gorge on chocolates, fish and chips and greasy takeaways. However when Katie saw an unflattering photograph of herself on the same day that Amber overheard an insulting comment, the pair embarked on a diet - slimming to 10st and 10st 11lbs respectively. The mother and daughter both piled on the pounds after Katie split from her husband in early 2013.Amber Hunt, 22, weighed 19st 11lbs and mother Katie, 50, was 18stAmber overheard a colleague describe her as 'that fat blonde one'Katie was mortified after seeing unflattering photos of herself on FacebookThe pair started a diet on the same day, unaware of coincidenceThey lost 17 stone between them and are now a size ten and 12 
 Question:Katie joined Slimming World in August 2013 but unknown to her, _ also started dieting and going to the gym.

Amber