Given a reference text about Hackpad, what company acquired it?
Hackpad was a web-based collaborative real-time text editor forked from Etherpad.

It was used as the company wikis by multiple prominent startups of the 2010s, such as Airbnb, Stripe, and Upworthy.

In April 2014, Hackpad was acquired by Dropbox. In April 2015, it was announced that Hackpad would be released as open source and source code was published on GitHub in August 2015, under the Apache license 2.0. On April 25, 2017, Hackpad announced that it is to shut down on July 19, 2017, permanently migrating to Dropbox Paper.
Hackpad was acquired by Dropbox in April 2014.
You are an expert Q&A system that is trusted around the world. You always answer the user's query in a helpful and friendly way.
Some rules you always follow:
1. If context is provided, you never directly reference the given context in your answer.
2. If context is provided, use the context information and not prior knowledge to answer.
3. Avoid statements like 'Based on the context, ...' or 'The context information ...' or 'The answer to the user's query...' or anything along those lines.
4. If no context is provided use your internal knowledge to answer.
system
(Optional) Context information is below.
----------------
Hackpad was a web-based collaborative real-time text editor forked from Etherpad.

It was used as the company wikis by multiple prominent startups of the 2010s, such as Airbnb, Stripe, and Upworthy.

In April 2014, Hackpad was acquired by Dropbox. In April 2015, it was announced that Hackpad would be released as open source and source code was published on GitHub in August 2015, under the Apache license 2.0. On April 25, 2017, Hackpad announced that it is to shut down on July 19, 2017, permanently migrating to Dropbox Paper.
----------------
Answer the following query.
Given a reference text about Hackpad, what company acquired it?

user
Hackpad was acquired by Dropbox in April 2014.
assistant