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:
| NGC number | Object type | Constellation | Right ascension ( J2000 ) | Declination ( J2000 ) |
| --- | --- | --- | --- | --- |
| 6913.0 | Open cluster | Cygnus | 20h23m56s | °31′ |
| 6914.0 | Diffuse nebula | Cygnus | 20h25m | +42° |
| 6934.0 | Globular cluster | Delphinus | 20h34m11.5s | °24′15″ |
| 6946.0 | Spiral galaxy | Cepheus | 20h34m51.4s | °09′18″ |
| 6960.0 | Diffuse nebula | Cygnus | 20h45m38.0s | °42′30″ |
| 6981.0 | Globular cluster | Aquarius | 20h53m27.9s | °32′13″ |
| 6994.0 | Asterism | Aquarius | 20h59m | °38′ |
| 6995.0 | Diffuse nebula | Cygnus | 20h57m | °13′ |
| 6996.0 | Association of stars | Cygnus | 20h56m25s | °28′ |
| 6997.0 | Open cluster | Cygnus | 20h56m40s | °39′ |
| 6998.0 | Elliptical galaxy | Microscopium | 21h01m37.7s | °01′55″ |
| 6999.0 | Lenticular galaxy | Microscopium | 21h01m59.5s | °03′32″ |
| 7000.0 | Diffuse nebula | Cygnus | 20h58m47s | °20′ |
Question:
What Constellation has a 20h56m40s Right Ascension (J2000)?
Answer:
Cygnus