Well, if a primary source says that a country one a historic battle, and we find rope and unfired weapons and a large amount of bones inside of the rope area, then the primary source is then questioned.
This is all true
1. Getting sick from eating too much hotdogs
2.Getting sick from drinking too much beer
3.Throat cancer
4.He likely encountered STD's of some kind at some point in his life
5. Only one of his siblings survived past infancy and his mother died of tuberculosis when he was a teenager
6. He was sent to
The answer is Barack Obama
Some people find it helpful to move around while they read. Speak out loud as well, it will force your mind stay on track. Fidget some, get a fidget idem or just move some part of your bod, this especially helps when you are in school and do not have time for breaks. You can try changing positions every so often. Do not try to work all at once either, read in short burst and take a break to think about what you read. Keep distracting things out of your line of sight. It might also help to change the subject material once and a while.
I hope this is a little bit helpful :)