### Human: How many volunteers participated in the build days?
### Assistant: Over 500 volunteers participated in the build days.

### Human: When did the build days take place?
### Assistant: The build days took place in summer and fall of 2019.

### Human: What type of community came together for the build days?
### Assistant: The interfaith religious community came together for the build days.

### Human: How many houses were completed during the build days?
### Assistant: Twelve houses were completed during the build days.

### Human: What was the purpose of the build days?
### Assistant: The purpose of the build days was to engage the interfaith religious community in Habitat for Humanity-style building activities.