Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Ex Input:
Context: What determines if a baby is a male or female? Recall that you have 23 pairs of chromosomesand one of those pairs is the sex chromosomes. Everyone has two sex chromosomes. Your sex chromosomes can be X or Y. Females have two X chromosomes (XX), while males have one X chromosome and one Y chromosome (XY). If a baby inherits an X chromosome from the father and an X chromosome from the mother, what will be the childs sex? The baby will have two X chromosomes, so it will be female. If the fathers sperm carries the Y chromosome, the child will be male. Notice that a mother can only pass on an X chromosome, so the sex of the baby is determined by the father. The father has a 50 percent chance of passing on the Y or X chromosome, so there is a 50 percent chance that a child will be male, and there is a 50 percent chance a child will be female. This 50:50 chance occurs for each baby. A couples first five children could all be boys. The sixth child still has a 50:50 chance of being a girl. One special pattern of inheritance that doesnt fit Mendels rules is sex-linked inheritance, referring to the inher- itance of traits that are located on genes on the sex chromosomes. Since males and females do not have the same sex chromosomes, there will be differences between the sexes in how these sex-linked traitstraits linked to genes located on the sex chromosomesare expressed. Sex-linked traits usually refer to traits due to genes on the X chromosome. One example of a sex-linked trait is red-green colorblindness. People with this type of colorblindness cannot tell the difference between red and green. They often see these colors as shades of brown ( Figure 1.1). Boys are much more likely to be colorblind than girls ( Table 1.1). This is because colorblindness is a sex-linked, recessive trait. Boys only have one X chromosome, so if that chromosome carries the gene for colorblindness, they will be colorblind. As girls have two X chromosomes, a girl can have one X chromosome with the colorblind gene and one X chromosome with a normal gene for color vision. Since colorblindness is recessive, the dominant normal gene will mask the recessive colorblind gene. Females with one colorblindness allele and one normal allele are referred to as carriers. They carry the allele but do not express it. How would a female become colorblind? She would have to inherit two genes for colorblindness, which is very unlikely. Many sex-linked traits are inherited in a recessive manner. Xc Xc X (carrier female) Xc Y (colorblind male) X Y X XX (normal female) XY (normal male) According to this Punnett square ( Table 1.1), the son of a woman who carries the colorblindness trait and a male with normal vision has a 50% chance of being colorblind. 
 Question: most sex-linked genes are ___________.

Ex Output:
recessive


Ex Input:
Context: FreeBSD is a free Unix-like operating system descended from Research Unix via the Berkeley Software Distribution (BSD). 
 Question: The FreeBSD is based upon what?

Ex Output:
berkeley software distribution


Ex Input:
Context: The film opens as Alice Melbourne and Judson Ellis arrive at a California Municipal Airport by taxi. Alighting from the cab they tip the driver generously, bribing him to not say anything to anyone about them. Alice and Judson check the departure sign for The Silver Queen, heading for Panama City, Panama, and seem excited and anxious.Also waiting for the same flight is Peggy Nolan, to whom a delivery of expensive flowers is made with a card thanking her for some favor. Peggy disdainfully tosses the card in the trash and gives the flowers to a woman selling cheap gardenias.Soon after, the flight gets ready to leave and we are introduced to Professor and Mrs. Spengler, an elderly couple, and Joe, the flight's co-pilot, who is immediately attracted to Alice. Mrs. Spengler is a domineering woman, but her husband seems content to be bossed around like a child.As they wait on the tarmac near the 'plane a car drives up and a well dressed man emerges with a young boy and another man. The boy is Tommy and he is being sent away with "Uncle" Pete until his father -- a mobster -- can follow later.As the passengers board, Bill, the pilot, receives word that they will be transporting an anarchist back to Panama, but he assures the group there is nothing to worry about since the man will be in custody during the flight. The prisoner is Vasquez, and is being accompanied by a bounty hunter named Crimp.After Larry the steward helps everyone get settled, the flight departs with its twelve souls aboard. Bill and Joe discuss plans for the layover and Joe indicates he has an interest in Alice. He goes back to the passenger compartment where beds have been made up and people are turning in for the night -- except for Crimp who plans to stay up and make sure Vasquez doesn't "go for a walk" -- thus cheating the hangman and himself out of $5,000.Pete tucks his young charge in for the night and helps him say his prayers (something Pete is unfamiliar with). Peggy comes up to the cockpit to visit with Bill, whose rudeness finally makes it clear that he wants nothing to do with her. When Alice rings for the steward, Joe takes the call and makes a play for her.Next morning the 'plane arrives for a refueling stop in Mexico and the passengers have breakfast. Joe continues to pursue Alice, under the assumption that she is Judson's secretary. Peggy makes another stab at getting Bill to warm to her and is rebuffed again. Then Pete tells her that her help isn't needed when she tries to get Tommy to drink his milk. Peggy's been "marked" as a loose woman by her fellow travelers who want nothing to do with her.Before boarding the 'plane a reporter confronts Judson and Alice and Joe learns that she is engaged to her "boss" and they are eloping.As the flight continues and heads into stormy weather the Professor discusses the methods by which a South American tribe of headhunters practice their craft. The conversation is interrupted by a news bulletin which recounts how Tommy's father has been killed. Peggy again tries to help with Tommy, saying "he needs a woman." But Pete is still being judgemental and answers "he needs a lady." Mrs. Spengler intervenes and comforts Tommy.As the storm they are flying through gets rougher, the passengers strap themselves into their seats and Crimp insists the pilots turn back. As the 'plane rocks back and forth a couple of metal cylinders break loose and crash through the back door. Tommy comes perilously close to going out the door when Llarry saves him and hands him to Pete. Just then the 'plane dips sharply and Larry is tossed out the door to his death. As Joe and Bill try to steady the 'plane Crimp tries to force them to turn back by waving his gun at them. In the struggle the gun goes off and is picked up by Vasquez.With a damaged engine the Silver Queen crashes, and all eleven on board survive. The next morning Joe and Bill admit to the professor that they were blown off 
 Question: Who patches the airliner's oil leak?

Ex Output:

bill and joe