Good sentence
1)Sometimes memory is downright(Used to emphasize that something is completely bad or untrue) creative.
ex) I can be downright stressfully sometimes.

2)Studies like this are exceedingly(=extremely) rare.
ex)His GPA in university is exceedingly high.

3)Since 1938, we've tracked the lives of two groups of men.
ex)Since a year ago, I've tracked my ancestor