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Table 2

YSCC classification scheme.

Class Main properties # YSCCs

b GMC, embedded SF 97
c exposed SF (c1 + c2 + c3) (410)
c1 GMC, Hα, MIR coincident 55
c2 GMC, Hα, MIR, FUV coincident 216
c3 no GMC, with FUV, weak Hα 139
d GMC, ambiguous 19
e no GMC, no optical counterpart 104

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