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.

[Q]:  Many types of ylides can be prepared with various functional groups both on the anionic carbon center and on the sulfur . The substitution pattern can influence the ease of preparation for the reagents ( typically from the sulfonium halide , e.g. trimethylsulfonium iodide ) and overall reaction rate in various ways . The general format for the reagent is shown on the right . Use of a sulfoxonium allows more facile preparation of the reagent using weaker bases as compared to sulfonium ylides . ( The difference being that a sulfoxonium contains a doubly bonded oxygen whereas the sulfonium does not . ) The former react slower due to their increased stability . In addition , the dialkylsulfoxide by @-@ products of sulfoxonium reagents are greatly preferred to the significantly more toxic , volatile , and odorous dialkylsulfide by @-@ products from sulfonium reagents . The vast majority of reagents are monosubstituted at the ylide carbon ( either R1 or R2 as hydrogen ) . Disubstituted reagents are much rarer but have been described : If the ylide carbon is substituted with an electron @-@ withdrawing group ( EWG ) , the reagent is referred to as a stabilized ylide . These , similarly to sulfoxonium reagents , react much slower and are typically easier to prepare . These are limited in their usefulness as the reaction can become prohibitively sluggish : examples involving amides are widespread , with many fewer involving esters and virtually no examples involving other EWG 's . For these , the related Darzens reaction is typically more appropriate . If the ylide carbon is substituted with an aryl or allyl group , the reagent is referred to as a semi @-@ stabilized ylide . These have been developed extensively , second only to the classical methylene reagents ( R1  R2  H ) . The substitution pattern on aryl reagents can heavily influence the selectivity of the reaction as per the criteria above . If the ylide carbon is substituted with an alkyl group the reagent is referred to as an unstabilized ylide . The size of the alkyl groups are the major factors in selectivity with these reagents . The R @-@ groups on the sulfur , though typically methyls , have been used to synthesize reagents that can perform enantioselective variants of the reaction ( See Variations below ) . The size of the groups can also influence diastereoselectivity in alicyclic substrates .  fill in the blank  :  Many types of ylides can be __________________ with various functional groups both on the anionic carbon center and on the sulfur . 
[A]:  prepared 


[Q]:  Barker was a devout Christian , and produced religious @-@ themed works throughout her life . She published eight postcards and five guardian angel birthday cards for the Society for Promoting Christian Knowledge in 1916 and in 1923 respectively . Christmas cards were designed for The Girls ' Friendly Society over a 20 @-@ year period , and the first three designs sold out a combined printing of 46 @,@ 500 in 1923 . An original design for the society called The Darling of the World Has Come was purchased by Queen Mary for ₤ 5 @.@ 5 @.@ 0 in 1926 . The Croydon Art Society hung Barker 's booklet cover design for the Society for the Propagation of the Gospel in its November 1919 exhibition . Religious @-@ themed books include The Children 's Book of Hymns ( 1929 ) and He Leadeth Me ( 1933 ) , the latter written in collaboration with her sister . Major religious works include the triptychs in oil , The Feeding of the Five Thousand ( 1929 ) , for the chapel in Llandaff House , a home for destitute women at Penarth , Wales , and The Parable of the Great Supper ( 1934 ) for St. George 's Chapel , Waddon . The Feeding has since disappeared , and only a black @-@ and @-@ white photograph dated 1929 reproduces the work . In 1941 , she completed oil panels on the subject of the seven sacraments for the baptismal font at St. Andrew 's , South Croydon . She designed baptismal rolls for the wall behind the font in 1948 and 1962 . In 1946 , she completed the 4 x 7 ft. oil painting , Out of Great Tribulation , for the Memorial Chapel of Norbury Methodist Church . Following the death of her sister in 1954 , Barker began designs for a stained glass memorial window depicting Christ preparing to wash the feet of his disciples . Her last religious @-@ themed work , it was installed in St. Edmund 's , Pitlake , in 1962 . fill in the blank  :  Barker was a devout Christian , and produced religious @-@ themed works throughout her __________________ . 
[A]:  life 


[Q]:  Many types of ylides can be prepared with various functional groups both on the anionic carbon center and on the sulfur . The substitution pattern can influence the ease of preparation for the reagents ( typically from the sulfonium halide , e.g. trimethylsulfonium iodide ) and overall reaction rate in various ways . The general format for the reagent is shown on the right . Use of a sulfoxonium allows more facile preparation of the reagent using weaker bases as compared to sulfonium ylides . ( The difference being that a sulfoxonium contains a doubly bonded oxygen whereas the sulfonium does not . ) The former react slower due to their increased stability . In addition , the dialkylsulfoxide by @-@ products of sulfoxonium reagents are greatly preferred to the significantly more toxic , volatile , and odorous dialkylsulfide by @-@ products from sulfonium reagents . The vast majority of reagents are monosubstituted at the ylide carbon ( either R1 or R2 as hydrogen ) . Disubstituted reagents are much rarer but have been described : If the ylide carbon is substituted with an electron @-@ withdrawing group ( EWG ) , the reagent is referred to as a stabilized ylide . These , similarly to sulfoxonium reagents , react much slower and are typically easier to prepare . These are limited in their usefulness as the reaction can become prohibitively sluggish : examples involving amides are widespread , with many fewer involving esters and virtually no examples involving other EWG 's . For these , the related Darzens reaction is typically more appropriate . If the ylide carbon is substituted with an aryl or allyl group , the reagent is referred to as a semi @-@ stabilized ylide . These have been developed extensively , second only to the classical methylene reagents ( R1  R2  H ) . The substitution pattern on aryl reagents can heavily influence the selectivity of the reaction as per the criteria above . If the ylide carbon is substituted with an alkyl group the reagent is referred to as an unstabilized ylide . The size of the alkyl groups are the major factors in selectivity with these reagents . The R @-@ groups on the sulfur , though typically methyls , have been used to synthesize reagents that can perform enantioselective variants of the reaction ( See Variations below ) . The size of the groups can also influence diastereoselectivity in alicyclic substrates .  fill in the blank  :  Many types of ylides can be __________________ with various functional groups both on the anionic carbon center and on the sulfur . 
[A]:
 prepared