In this task, you will be given a passage to read. A fill in the blank question will be given to you.  Your answer should fit the blank appropriately.

Ex Input:
 The reaction mechanism for the Johnson – Corey – Chaykovsky reaction consists of nucleophilic addition of the ylide to the carbonyl or imine group . A negative charge is transferred to the heteroatom and because the sulfonium cation is a good leaving group it gets expelled forming the ring . In the related Wittig reaction , the formation of the much stronger phosphorus @-@ oxygen double bond prevents oxirane formation and instead , olefination takes place through a 4 @-@ membered cyclic intermediate . The trans diastereoselectivity observed results from the reversibility of the initial addition , allowing equilibration to the favored anti betaine over the syn betaine . Initial addition of the ylide results in a betaine with adjacent charges ; density functional theory calculations have shown that the rate @-@ limiting step is rotation of the central bond into the conformer necessary for backside attack on the sulfonium . The degree of reversibility in the initial step ( and therefore the diastereoselectivity ) depends on four factors , with greater reversibility corresponding to higher selectivity : Stability of the substrate with higher stability leading to greater reversibility by favoring the starting material over the betaine . Stability of the ylide with higher stability similarly leading to greater reversibility . Steric hindrance in the betaine with greater hindrance leading to greater reversibility by disfavoring formation of the intermediate and slowing the rate @-@ limiting rotation of the central bond . Solvation of charges in the betaine by counterions such as lithium with greater solvation allowing more facile rotation in the betaine intermediate , lowering the amount of reversibility . fill in the blank  :  The reaction mechanism for the Johnson – Corey – Chaykovsky reaction consists of nucleophilic addition of the ylide to the carbonyl or __________________ group . 

Ex Output:
 imine 


Ex Input:
 The title track and the song have received various cover interpretations , particularly on Slayer tribute albums . Toni Ferguson recorded string quartet adaptations of both tracks on the album The String Quartet Tribute to Slayer : The Evil You Dread , with the former cover being described as having by AllMusic 's Johnny Loftus . 1995 Slayer tribute album Slatanic Slaughter featured three tracks which originally appeared on South of Heaven , with the title track , Mandatory Suicide  and  Spill the Blood  interpreted by Cemetary , Crown of Thorns and Grope respectively . Its 1998 follow up Slatanic Slaughter , Vol . 2 only featured two tracks originally from the album ; namely  Silent Scream  arranged by Vader and  Read Between the Lies interpreted by Anathema . 1999 's Straight to Hell : A Tribute to Slayer collected four Slayer renditions which originated on the album , with versions of South of Heaven performed by Abaddon ( Venom ) and Electric Hellfire Club , Mandatory Suicide  cut by Chapter 7 and  Behind the Crooked Cross adapted by Gigantor . 2006 Argentine tribute album Al Sur Del Abismo ( Tributo Argentino A Slayer ) saw Nafak and Climatic Terra also respectively cover  South of Heaven  and  Mandatory Suicide . Hatebreed covered the song Ghosts of War for their 2009 cover album For the Lions . They released a music video for it also . Korn has covered the title track at least twice live , once with Kid Rock on vocals and another using the intro to follow into one of their songs live . fill in the blank  :  The title track and the song  Mandatory Suicide  have received various cover interpretations , __________________ on Slayer tribute albums . 

Ex Output:
 particularly 


Ex Input:
 Gods were linked with specific regions of the universe . In Egyptian tradition , the world includes the earth , the sky , and the Duat . Surrounding them is the dark formlessness that existed before creation . The gods in general were said to dwell in the sky , although gods whose roles were linked with other parts of the universe were said to live in those places instead . Most events of mythology , set in a time before the gods ' withdrawal from the human realm , take place in an earthly setting . The deities there sometimes interact with those in the sky . The Duat , in contrast , is treated as a remote and inaccessible place , and the gods who dwell there have difficulty communicating with those in the world of the living . The space outside the cosmos is also said to be very distant . It too is inhabited by deities , some hostile and some beneficial to the other gods and their orderly world . In the time after myth , most gods were said to be either in the sky or invisibly present within the world . Temples were their main means of contact with humanity . Each day , it was believed , the gods moved from the divine realm to their temples , their homes in the human world . There they inhabited the cult images , the statues that depicted deities and allowed humans to interact with them in temple rituals . This movement between realms was sometimes described as a journey between the sky and the earth . As temples were the focal points of Egyptian cities , the god in a city 's main temple was the patron god for the city and the surrounding region . Deities ' spheres of influence on earth centered on the towns and regions they presided over . Many gods had more than one cult center , and their local ties changed over time . They could establish themselves in new cities , or their range of influence could contract . Therefore , a given deity 's main cult center in historical times is not necessarily his or her place of origin . The political influence of a city could affect the importance of its patron deity . When kings from Thebes took control of the country at start of the Middle Kingdom ( c . 2055 – 1650 BC ) , they elevated Thebes ' patron gods — first the war god Montu and then Amun — to national prominence . fill in the blank  :   __________________ were linked with specific regions of the universe . 

Ex Output:

 Gods