#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define FORR2(x,y,arr) for(auto& [x,y]:arr)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
template<class T> bool chmax(T &a, const T &b) { if(a<b){a=b;return 1;}return 0;}
template<class T> bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;}
//-------------------------------------------------------


int N,K,Q;
int A[202020],B[202020];
vector<pair<int,int>> pos[404040];
int P[404040];
int L[404040],R[404040],X[404040];
vector<int> ev[404040];
int ret[404040];
void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>N>>K>>Q;
	FOR(i,N) {
		pos[i]={{0,i}};
		P[i]=i;
	}
	
	for(i=1;i<=K;i++) {
		cin>>A[i]>>B[i];
		A[i]--;
		B[i]--;
		swap(P[A[i]],P[B[i]]);
		pos[P[A[i]]].push_back({i,A[i]});
		pos[P[B[i]]].push_back({i,B[i]});
	}
	FOR(i,Q) {
		cin>>L[i]>>R[i]>>X[i];
		X[i]--;
		ev[R[i]].push_back(i);
	}
	FOR(i,N) P[i]=i;
	for(i=1;i<=K;i++) {
		swap(P[A[i]],P[B[i]]);
		FORR(e,ev[i]) {
			y=P[X[e]];
			auto it=lower_bound(ALL(pos[y]),make_pair(L[e],0));
			it--;
			ret[e]=it->second+1;
		}
	}
	
	FOR(i,Q) cout<<ret[i]<<endl;
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false), cin.tie(0);
	FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	cout.tie(0); solve(); return 0;
}