This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) the answer is unique, (iv) its answer is a continous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage

An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a wire filament heated to a high temperature, by passing an electric current through it, until it glows with visible light (incandescence). The hot filament is protected from oxidation with a glass or quartz bulb that is filled with inert gas or evacuated. In a halogen lamp, filament evaporation is prevented by a chemical process that redeposits metal vapor onto the filament, extending its life. The light bulb is supplied with electric current by feed-through terminals or wires embedded in the glass. Most bulbs are used in a socket which provides mechanical support and electrical connections.

Incandescent bulbs are much less efficient than most other types of electric lighting; incandescent bulbs convert less than 5% of the energy they use into visible light, with standard light bulbs averaging about 2.2%. The remaining energy is converted into heat. The luminous efficacy of a typical incandescent bulb is 16 lumens per watt, compared with 60 lm/W for a compact fluorescent bulb or 150 lm/W for some white LED lamps. Some applications of the incandescent bulb deliberately use the heat generated by the filament. Such applications include incubators, brooding boxes for poultry, heat lights for reptile tanks, infrared heating for industrial heating and drying processes, lava lamps, and the Easy-Bake Oven toy. Incandescent bulbs typically have short lifetimes compared with other types of lighting; around 1,000 hours for home light bulbs versus typically 10,000 hours for compact fluorescents and 30,000 hours for lighting LEDs.
What is the energy source for an incandescent bulb?

(CNN)A 17-year-old male fatally shot an Iraqi man watching his first snowfall in his new American hometown, targeting him and then continuing to fire as the immigrant rushed to get inside, Dallas police said Friday.

Authorities don't believe the suspected shooter knew the victim, Ahmed Al-Jumaili, Dallas Police Maj. Jeff Cotner said reporters, nor do they believe he knew Al-Jumaili's ethnicity.

And they haven't given any indication Al-Jumaili had anything to do with what led the teen to head out armed in the first place -- a purported shooting at his girlfriend's apartment, if that in fact happened. Cotner said that, while there have nearby shootings that might be tied to gangs, "we (have been) unable to substantiate ... whether or not there was an actual shooting at the apartment."

What police do believe, based on witness testimony and other evidence, is that the teenager shot and killed Al-Jumaili, for whatever reason.

"When he saw Mr. Al-Jumaili and their family, he targeted them, he shot at them with intent," Cotner said of the suspect, who is under arrest. "And as Mr. Al-Jumaili ran back toward his apartment, he tracked him with his rifle and continued to fire."

Dallas police named the suspected shooter, though CNN is not identifying him yet since he's a minor and it's not clear if he'll be charged as an adult. The teen turns 18 in May, police said.

Until the fatal shots ended Al-Jumalli's life, March 4 had been a day of fun and joy for Al-Jumaili and his family.
When did the fatal shots take place?

(CNN) -- Jason Priestley played Brandon Walsh on "Beverly Hills 90210" from 1990 to 1998. Having long since hung up his Peach Pit uniform and Beverly Hills Beach Club cabana boy polo shirt, his character became a journalist and departed to take a job at the Washington Bureau of the New York Chronicle, and Priestley left the show four episodes into the series' ninth season.

"I felt that the character of Brandon had kind of run his course. I had explored everything I wanted to explore with him," Priestley told CNN while promoting his new book, "Jason Priestley: A Memoir" (HarperOne) at the New York Bureau of CNN.

"In retrospect, I do regret leaving. Understanding what I do now about story and character, I believe that [Aaron Spelling] was pushing the story in a direction that would have had Brandon and Kelly end up together at the end of the show and I think I probably should have stuck around to its fruition."

Fans of "90210" surely remember Kelly Taylor's (Jennie Garth) "I choose me" speech following Brandon and Dylan McKay's (Luke Perry) showdown for her affections. Brandon wanted Kelly to marry him. Dylan wanted to take her on a trip around the world. But Priestley believes Executive Producer Aaron Spelling had always envisioned Brandon and Kelly riding off into the sunset.

"I think my departure also hurt Aaron's feelings," continued Priestley. "Aaron and I had worked very closely together for a number of years. He gave me a lot of opportunities, and I feel like my departure hurt his feelings and I never meant to do that."
What actor portrayed Brandon Walsh?