#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define ff first
#define ss second
#define pb push_back
#define vi vector<int>
#define fr(i,ii,iii) for(int i=ii;i<iii;i++)
const int N=2002;
int n,m,q;
pii p[N];
int f[N];
int main(){
ios_base::sync_with_stdio(NULL);cin.tie(NULL);
cin>>n>>m>>q;
fr(i,1,m+1)cin>>p[i].ff>>p[i].ss;
sort(p+1,p+m+1);
fr(i,0,q){
int x,y;cin>>x>>y;
bool ok=0,ok1=1,ok2=0;
fr(i,1,m+1){
if(p[i].ss==y)ok2=1;
if(p[i].ff==x){
ok=1;
continue;
}
if(ok==1){
if(p[i].ff<=p[i-1].ss+1);
else ok1=0;
}
}
if(ok==1 and ok1==1 and ok2==1)cout<<"YES\n";
else cout<<"NO\n";
}
}
/*
6 2 1
1 2
3 4
1 4
l=0,1,2,4
*/
