Amount,From,To,Date,Reason,Rate,ali,bob,car
0,,,1970-01-01,,0,0,0,0
0,,,2005-05-31,,0.05,0,0,0
1000,bob,ali,2006-05-31,transfer from bob to alice; maybe alice bought bob a bike,0.06,1000,-1000,0
1000,ali,bob,2006-05-31,this is alice transferring the $1000 back to bob again,0.06,0,0,0
0,,,2011-10-18,,0.06,0,0,0