Based on the clue 'arlo guthrie im the train they call the city of th...', what is the answer?

What is associated with: arlington county virginia 37 mil sq ft usable floor space here can hold approx 25000 ppl 5 sid… What is associated with: arlington house was this mans family mansion until confiscated by the us government in 1864? Based on the clue 'arlington is located between these third sixth mo...', what is the answer? What is associated with: arlington national cemetery which is home to the mast of this ship that blew up in 1898? Based on the clue 'arlo guthrie starred in this 69 film inspired by h...', what is the answer? What is referred to by 'arm bone ln'? What is referred to by 'arm nut'? Based on the clue 'arm of al anon thats specifically for young people...', what is the answer?