The Girdler sulfide (GS) process, also known as the GeibSpevack (GS) process, is an industrial production method for filtering out of natural water the heavy water (deuterium oxide = DO) which is used in particle research, in Deuterium NMR spectroscopy, deuterated solvents for proton NMR spectroscopy, in heavy water nuclear reactors (as a coolant and moderator) and in deuterated drugs.
Deuterium NMR spectroscopy uses the GeibSpevack process to create heavy water. OPTIONS:
- Yes
- It's impossible to say
- No
A: No

Phacelia mutabilis is a species of flowering plant in the borage family known by the common name changeable phacelia. It is native to the western United States and Baja California, where it can be found in mountains and foothills, in forested and open habitat types, and deserts.
Phacelia mutabilis is most commonly found in deserts OPTIONS:
- Yes
- It's impossible to say
- No
A: It's impossible to say

Ferry is a ghost town in Ferry County, Washington, United States. Ferry was founded during the late 1890s. The town was located to the west of Vulcan Mountain. Ferry was a ramshackle collection of crude log homes and false front buildings to support the mining boom in the area. By 1910 insurance fires took their toll and before long Ferry had passed into oblivion. Today little remains of the town.
The ghost town in Ferry County Washington has many ghosts. OPTIONS:
- Yes
- It's impossible to say
- No
A:
It's impossible to say