Question: What type of group does Andi Kravljaca and Darby Crash have in common?

<P0-S0> Shane West (born Shannon Bruce Snaith; June 10, 1978) is an American actor, punk rock musician, and songwriter. <P0-S1>  West is known for his portrayal of Eli Sammler in the ABC family drama "Once and Again", Landon Carter in "A Walk to Remember", Darby Crash in "What We Do Is Secret", Dr. Ray Barnett in the NBC medical drama "ER" and Michael Bishop in The CW spy drama "Nikita". <P0-S2>  He also starred in the WGN fantasy/adventure/historical drama "Salem" as John Alden. <SEP> <P1-S0> Darby Crash (formerly Bobby Pyn; born Jan Paul Beahm; September 26, 1958 – December 7, 1980) was an American punk rock vocalist and songwriter who, along with long-time friend Pat Smear (born Georg Ruthenberg), co-founded the punk rock band the Germs. <P1-S1>  He committed suicide by way of an intentional heroin overdose. <P1-S2>  In the years since his suicide at the age of 22, the Germs have attained legendary status among punk rock fans and musicians alike, as well as from the wider alternative rock and underground music community in general. <P1-S3>  Crash has come to be revered as a unique and talented songwriter; his myriad literary, musical and philosophical influences, which varied from Friedrich Nietzsche and David Bowie to Charles Manson and Adolf Hitler, resulted in lyrics that were unusually wordy and impressionistic in the realm of punk rock at the time, immediately setting Crash and his band apart from most other Los Angeles punk groups that sprang up in the late 1970s. <SEP> <P2-S0> Andi Kravljaca is a Bosnian-born Swedish heavy metal singer. <P2-S1>  He was born in Sarajevo. <P2-S2>  His main band is the progressive metal band Aeon Zen, although he is perhaps best known as vocalist for Swedish progressive metal band, Seventh Wonder, appearing on the band's first album, Become, in 2005. <SEP> <P3-S0> Metal-catalyzed C–H borylation reactions are transition metal catalyzed organic reactions that produce an organoboron compound through functionalization of aliphatic and aromatic C–H bonds and are therefore useful reactions for carbon–hydrogen bond activation. <P3-S1>  Metal-catalyzed C–H borylation reactions utilize transition metals to directly convert a C–H bond into a C–B bond. <P3-S2>  This route can be advantageous compared to traditional borylation reactions by making use of cheap and abundant hydrocarbon starting material, limiting prefunctionalized organic compounds, reducing toxic byproducts, and streamlining the synthesis of biologically important molecules. <P3-S3>  Boronic acids, and boronic esters are common boryl groups incorporated into organic molecules through borylation reactions. <P3-S4>  Boronic acids are trivalent boron-containing organic compounds that possess one alkyl substituent and two hydroxyl groups. <P3-S5>  Similarly, boronic esters possess one alkyl substituent and two ester groups. <P3-S6>  Boronic acids and esters are classified depending on the type of carbon group (R) directly bonded to boron, for example alkyl-, alkenyl-, alkynyl-, and aryl-boronic esters. <P3-S7>  The most common type of starting materials that incorporate boronic esters into organic compounds for transition metal catalyzed borylation reactions have the general formula (RO)B-B(OR). <P3-S8>  For example, Bis(pinacolato)diboron (BPin), and bis(catecholato)diborane (BCat) are common boron sources of this general formula.