import sys
readline=sys.stdin.readline

def Mo(N,Q,query):
    D=max(1,int(N/Q**.5))
    mo=[[] for d in range((N+D-1)//D+1)]
    for q,(l,r) in enumerate(query):
        mo[l//D].append(q)
    retu=[]
    for d in range((N+D-1)//D+1):
        retu+=sorted(mo[d],reverse=d%2,key=lambda q:query[q][1])
    return retu

N,K,Q=map(int,readline().split())
A,B=[],[]
for k in range(K):
    a,b=map(int,readline().split())
    a-=1;b-=1
    A.append(a)
    B.append(b)
query=[]
for q in range(Q):
    l,r,x=map(int,readline().split())
    l-=1
    x-=1
    query.append((l,r,x))
ans_lst=[None]*Q
L,R=0,0
perm=[i for i in range(N)]
idx=[i for i in range(N)]
for q in Mo(K,Q,[(l,r) for l,r,x in query]):
    l,r,x=query[q]
    while l<L:
        L-=1
        idx[A[L]],idx[B[L]]=idx[B[L]],idx[A[L]]
        perm[idx[A[L]]]=A[L]
        perm[idx[B[L]]]=B[L]
    while R<r:
        perm[A[R]],perm[B[R]]=perm[B[R]],perm[A[R]]
        idx[perm[A[R]]]=A[R]
        idx[perm[B[R]]]=B[R]
        R+=1
    while L<l:
        idx[A[L]],idx[B[L]]=idx[B[L]],idx[A[L]]
        perm[idx[A[L]]]=A[L]
        perm[idx[B[L]]]=B[L]
        L+=1
    while r<R:
        R-=1
        perm[A[R]],perm[B[R]]=perm[B[R]],perm[A[R]]
        idx[perm[A[R]]]=A[R]
        idx[perm[B[R]]]=B[R]
    ans_lst[q]=perm[x]+1
print(*ans_lst,sep="\n")