What are the top graph databases?
1. Neo4j
2. Microsoft Azure Cosmos DB
3. Virtuoso 
4. ArangoDB 
5. Amazon Neptune
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What are the top graph databases?
### Input: 
### Response: 1. Neo4j
2. Microsoft Azure Cosmos DB
3. Virtuoso 
4. ArangoDB 
5. Amazon Neptune