Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Category | Type | Attribute | Description | Bubbles | Cancelable |
| --- | --- | --- | --- | --- | --- |
| Mouse | dragstart | ondragstart | Fired on an element when a drag is started. | Yes | Yes |
| Keyboard | keyup | onkeyup | Fires when a key on the keyboard is released | Yes | Yes |
| HTML frame /object | resize | onresize | Fires when a document view is resized | Yes | No |
| HTML frame /object | scroll | onscroll | Fires when a document view is scrolled | Yes | No |
| HTML form | submit | onsubmit | Fires when a form is submitted | Yes | Yes |
| HTML form | reset | onreset | Fires when a form is reset | Yes | No |
| Mutation | DOMSubtreeModified | (none) | Fires when the subtree is modified | Yes | No |
| Mutation | DOMNodeRemoved | (none) | Fires when a node has been removed from a DOM-tree | Yes | No |
| Mutation | DOMNodeRemovedFromDocument | (none) | Fires when a node is being removed from a document | No | No |
| Mutation | DOMAttrModified | (none) | Fires when an attribute has been modified | Yes | No |
Question:
How many descriptions are there when the attribute is "ondragstart"?
Answer:
1.0