the day in 2001 when Arab suicide bombers hijacked United States airliners and used them as bombs
<noun.time>
<noun.time>
| 9-11 |
|
| 9/11 |
|
| Sep 11 |
|
| Sept. 11 |
|
| September 11 |
|
semantic pointers
domain of synset (topic)
instance hypernym
part holonym