Give you a statement and table with its title in Markdown format, please determine whether the statement is supported or refuted by, or is unrelated to the table. It'a binary classification problem, you should choose the answer between supported and refuted. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| fuel gas | upper index kcal / nm 3 | lower index kcal / nm 3 | upper index mj / nm 3 | lower index mj / nm 3 |
| hydrogen | 11528 | 9715 | 48.23 | 40.65 |
| methane | 12735 | 11452 | 53.28 | 47.91 |
| ethane | 16298 | 14931 | 68.19 | 62.47 |
| ethylene | 15253 | 14344 | 63.82 | 60.01 |
| natural gas | 12837 | 11597 | 53.71 | 48.52 |
| propane | 19376 | 17817 | 81.07 | 74.54 |
| propylene | 18413 | 17180 | 77.04 | 71.88 |
| n - butane | 22066 | 20336 | 92.32 | 85.08 |
| iso - butane | 21980 | 20247 | 91.96 | 84.71 |
| butylene - 1 | 21142 | 19728 | 88.46 | 82.54 |
| lpg | 20755 | 19106 | 86.84 | 79.94 |
| acetylene | 14655 | 14141 | 61.32 | 59.16 |
Title:
wobbe index
Statement:
the upper index kcal / nm 3 for natural gas and ethylene is 12837 and 15253 , respectively
Answer:
supported