claim: Sledgehammer was first performed live in America.
evidence: An Chang-ryon is a North Korean politician .. Ahn ( Korean name ). He served as a delegate to the Supreme People 's Assembly during its 9th -LRB- 1990 -RRB- , 10th -LRB- 1998 -RRB- , and 11th -LRB- 2003 -RRB- sessions .