who are agt finalists 2017?
['Darci Lynne Farmer. Age: 12. ... ', 'Angelica Hale. Age: 10. ... ', 'Mandy Harvey. Age: 29. ... ', 'Chase Goehring. Age: 21. ... ', 'Preacher Lawson. Age: 25. ... ', 'Light Balance. Age: 21-36. ... ', 'Sara and Hero. Age: 22 and 5. ... ', 'Diavolo. Age: 21-39.']