# Composite entities
A composite entity is a combination of two or more different, yet related [entities](https://docs.chatlayer.ai/nlp/natural-language-processing-nlp/detect-information-with-entities/..#entity-types). This type of entity allows you to combine two separate entities into a single one.
Composite entities tab.
Example of composite entity
When a user tells the bot *Two fries please*, the bot will understand this as the predefined composite entity `@order`*,* which consists of two separate entities:
* `@sys.number` **:** *2*, a [system entity](https://docs.chatlayer.ai/nlp/natural-language-processing-nlp/detect-information-with-entities/system-entities).
* and `@foodItem`: *fries*, a [match entity](https://docs.chatlayer.ai/nlp/natural-language-processing-nlp/detect-information-with-entities/match-entities).
### Add a composite entities
To add a composite entity to your bot:
1. From your [**Entities**](https://docs.chatlayer.ai/navigation/natural-language-processing-nlp/synonym-entities) tab, make sure that you have different entities that your composite would be made of. For this example, we created a `@car_brand` match entity and will use `@sys.number`.
2. Click on **Composite entitie**s.
3. Click on **Add composite entity**.
4. Fill in the **Entity name**.
5. Under **Entity values**, add the entities that will make the composite one.
Add a composite entity.
6. Click on **Create entity**.
### Route your conversation based on composite entity values
To route your flow based on composite entities:
1. Create a [**Collect input**](https://docs.chatlayer.ai/buildabot/flow-logic/dialog-state/user-input-bot-dialog) block where you composite entity will be detected. In this example, we detect `@car_info`.
Detect a composite entity inside your flow.
2. Let's say you now want to route the flow based on the year of the car. For instance:
* When the year is equal to or more than 2016, the car is a green car
* When the year is less than 2016, the car is not a green car.
3. Create a [**Condition**](https://docs.chatlayer.ai/buildabot/flow-logic/dialog-state/plugins) block that checks the `@car_brand.sys.number` variable.
Route the flow based on part of a composite entity.
