1 2 3 4 5 6 7 8 9 10 11 12 13 14"ts","dur","part","a","b" 150,100,0,"[NULL]",111 16100,200,0,"[NULL]",222 170,50,1,"[NULL]",333 1850,50,1,"[NULL]",444 19100,150,1,111,444 20250,50,1,111,"[NULL]" 21300,100,1,111,555 22400,100,1,111,666 23500,50,1,222,666 24550,50,1,"[NULL]",666 25600,50,1,333,666 26650,50,1,333,"[NULL]" 27100,1000,2,"[NULL]",777 28500,100,3,444,"[NULL]" 2950,50,4,"[NULL]",888 30100,100,4,555,"[NULL]" 31200,50,4,666,999 32250,50,4,777,"[NULL]" 33100,25,5,888,"[NULL]" 34125,50,5,888,1111 35175,15,5,888,"[NULL]" 36190,10,5,888,2222 37200,10,5,"[NULL]",2222 38