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:
| technology | moving parts | room temperature | flammable | toxic materials | in production | rare metals |
| flow | yes | yes | no | yes | no | no |
| liquid metal | no | no | yes | no | no | no |
| sodium - ion | no | no | yes | no | no | no |
| lead - acid | no | yes | no | yes | yes | no |
| sodium - sulfur batteries | no | no | no | yes | yes | no |
| ni - cd | no | yes | no | yes | yes | yes |
| lithium - ion | no | yes | yes | no | yes | no |
Title:
grid energy storage
Statement:
there are no moving parts of lead - acid
Answer:
supported