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:
| year | mission type | shogun | ryūkyūan king | lead envoy | number in entourage |
| 1634 | congratulation & gratitude | tokugawa iemitsu | shō hō | princes tamagusuku , kin , sashiki | unknown |
| 1644 | congratulation & gratitude | tokugawa iemitsu | shō ken | princes kin , kunigami | 70 |
| 1649 | gratitude | tokugawa iemitsu | shō shitsu | prince gushikawa chōei | 63 |
| 1653 | congratulation | tokugawa ietsuna | shō shitsu | prince kunigami | 71 |
| 1671 | gratitude | tokugawa ietsuna | shō tei | prince kin | 74 |
| 1682 | congratulation | tokugawa tsunayoshi | shō tei | prince nago | 94 |
| 1710 | congratulation & gratitude | tokugawa ienobu | shō eki | princes miri , tomigusuku | 168 |
| 1714 | congratulation & gratitude | tokugawa ietsugu | shō kei | princes kin , yonagusuku | 170 |
| 1718 | congratulation | tokugawa yoshimune | shō kei | prince goeku | 94 |
| 1748 | congratulation | tokugawa ieshige | shō kei | prince gushikawa | 98 |
| 1752 | gratitude | tokugawa ieshige | shō boku | prince nakijin | 94 |
| 1764 | congratulation | tokugawa ieharu | shō boku | prince yomitanzan | 96 |
| 1790 | congratulation | tokugawa ienari | shō boku | prince ginowan | 96 |
| 1796 | gratitude | tokugawa ienari | shō on | prince ōgimi | 97 |
| 1806 | gratitude | tokugawa ienari | shō kō | prince yomitanzan | 97 |
| 1832 | gratitude | tokugawa ienari | shō iku | prince tomigusuku | 78 |
| 1842 | congratulation | tokugawa ieyoshi | shō iku | prince urasoe | 99 |
| 1850 | gratitude | tokugawa ieyoshi | shō tai | prince tamakawa | 99 |
Title:
ryukyuan missions to edo
Statement:
seven of the 18 missions were for gratitude only
Answer:
supported