To delete sentences from the article summary:

You will see the source article on the left and the article summary on the right. You can delete sentences from either side.

1. On the left (source article): Click the X icon next to a sentence to remove it from the summary.

2. On the right (article summary): Hover over a sentence and click the 'delete' icon to remove it from the summary.

These actions will update the summary in real time, allowing you to refine it as needed.