#include <iostream>
#include <cstdio>
#include <cmath>
#include <vector>
#include <map>
#include <stack>
#include <queue>
#include <algorithm>
#include <set>
#include <cassert>

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,j) FOR(i,0,j)
#define mp std::make_pair

typedef long long ll;
typedef unsigned long long ull;

const int INF = 1001001001;

// S N E W(南北東西)
const int dx[8] = {0, 0, 1, -1, 1, 1, -1, -1}, dy[8] = {1, -1, 0, 0, 1, -1, 1, -1};

struct P{
    P(){}
    P(ll _r, ll _i):r(_r), i(_i){}
    void real(const ll& v){r = v;}
    void imag(const ll& v){i = v;}
    ll r, i;
};

ll real(const P& p){return p.r;}
ll imag(const P& p){return p.i;}
ll norm(const P& p){ll r = real(p), i = imag(p); return r * r + i * i;}

P operator+(const P& lhs, const P& rhs){
    return P(real(lhs)+real(rhs), imag(lhs)+imag(rhs));
}
P operator-(const P& lhs, const P& rhs){
    return P(real(lhs)-real(rhs), imag(lhs)-imag(rhs));
}
P operator-(const P& p){
    return P(-real(p), -imag(p));
}

ll cross(const P& lhs, const P& rhs){
    return real(lhs)*imag(rhs) - imag(lhs)*real(rhs);
}

ll dot(const P& lhs, const P& rhs){
    return real(lhs)*real(rhs) + imag(lhs)*imag(rhs);
}

ll distance(const P& a, const P& b, const P& p){
    ll c = cross(p-a, b-a);
    return c * c;
}

bool doesLineCrossCircle(const P& a, const P& b, const P& cc, const ll& radius){
    if(distance(a, b, cc) > radius * radius * norm(b-a)){return false;}
    if(norm(a-cc) > radius * radius && norm(b-cc) > radius * radius){
        return dot(cc-a, b-a) * dot(cc-b, b-a) <= 0;
    }
    return (norm(a-cc) < radius * radius) ^ (norm(b-cc) < radius * radius);
}

int N, M;
P wps[100100]; ll wrs[100100];

int main(){
    while(std::cin >> N, N){
        assert(N < 100100);
        REP(i, N){
            ll re, im;
            std::cin >> re >> im >> wrs[i];

            wps[i].real(re); wps[i].imag(im);
        }

        std::cin >> M;
    
        REP(i, M){
            P taro, oni;
            ll re, im;
            std::cin >> re >> im;
            taro.real(re); taro.imag(im);
            std::cin >> re >> im;
            oni.real(re); oni.imag(im);

            bool f = false;
            REP(j, N){
                assert(norm(taro-wps[j]) != wrs[j] * wrs[j] &&
                       norm(oni-wps[j]) != wrs[j] * wrs[j]);
                if(real(taro) == real(oni) &&
                   imag(taro) == imag(oni)){
                    continue;
                }
                if(doesLineCrossCircle(taro, oni, wps[j], wrs[j])){
                    f = true;
                }
            }

            if(f){
                puts("Safe");
            }else{
                puts("Danger");
            }
        }
    }
}