1 2 3 4 5 6"ts","dur","part","a","b" 7100,150,1,111,111 8250,50,1,111,"[NULL]" 9300,100,1,111,222 10400,100,1,111,333 11500,150,1,111,333 12500,50,3,222,333 13500,100,4,333,333 140,50,5,444,"[NULL]" 1550,200,5,444,111 16250,50,5,444,"[NULL]" 17300,100,5,444,222 18400,250,5,444,333 19650,350,5,444,"[NULL]" 20