user: What are some common types of snake plants?

assistant: Snake plants come in many varieties. Some common varieties include the bird's nest snake plant, cylinder snake plant, laurentii sansevieria, twisted sister, white snake plant, rhino grass, and sansevieria desertii.

user: Given this article about the NSA's ANT catalog, Which hacking tools are used to infect the BIOS of computers or networking devices?

assistant: DEITYBOUNCE, IRONCHEF, SOUFFLETROUGH, and SWAP are hacking tools that can be used to infect servers, computers, and networking devices.
DEITYBOUNCE is technology that installs a backdoor software implant on Dell PowerEdge servers via the motherboard BIOS and RAID controller(s).
IRONCHEF is technology that can "infect" networks by installing itself in a computer I/O BIOS. 
SOUFFLETROUGH is BIOS injection software that can compromise Juniper Networks SSG300 and SSG500 series firewalls.  
SWAP is technology that can reflash the BIOS of multiprocessor systems that run FreeBSD, Linux, Solaris, or Windows.

user: What is gravity?

assistant: Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.
Gravity (or the acceleration due to gravity) is 9.81 meters per second squared, on the surface of Earth, because of the size of Earth and the distance we are on its surface from its center.