#include <iostream>
#include <vector>
#include <queue>
#include <set>
 
using namespace std;
 
int h, w, q;
vector<string> grid;
 
// Arah gerakan: atas, bawah, kiri, kanan
int dx[] = {-1, 1, 0, 0};
int dy[] = {0, 0, -1, 1};
 
bool bfs(int sx, int sy, int ex, int ey, set<pair<int, int>>& blocked) {
    queue<pair<int, int>> q;
    set<pair<int, int>> visited;
    q.push({sx, sy});
    visited.insert({sx, sy});
 
    while (!q.empty()) {
        auto [x, y] = q.front(); q.pop();
 
        if (x == ex && y == ey) return true;
 
        for (int i = 0; i < 4; ++i) {
            int nx = x + dx[i], ny = y + dy[i];
            if (nx >= 0 && nx < h && ny >= 0 && ny < w && grid[nx][ny] == '.' && !blocked.count({nx, ny}) && !visited.count({nx, ny})) {
                visited.insert({nx, ny});
                q.push({nx, ny});
            }
        }
    }
    return false;
}
 
bool isInteresting(set<pair<int, int>>& blocked) {
    queue<pair<int, int>> q;
    set<pair<int, int>> visited;
    q.push({0, 0});
    visited.insert({0, 0});
 
    while (!q.empty()) {
        auto [x, y] = q.front(); q.pop();
 
        if (x == h - 1 && y == w - 1) {
            return bfs(h - 1, w - 1, 0, 0, blocked);
        }
 
        for (int i = 0; i < 4; ++i) {
            int nx = x + dx[i], ny = y + dy[i];
            if (nx >= 0 && nx < h && ny >= 0 && ny < w && grid[nx][ny] == '.' && !blocked.count({nx, ny}) && !visited.count({nx, ny})) {
                visited.insert({nx, ny});
                q.push({nx, ny});
            }
        }
    }
    return false;
}
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
 
    cin >> h >> w >> q;
    grid.resize(h);
 
    for (int i = 0; i < h; ++i) {
        cin >> grid[i];
    }
 
    while (q--) {
        int k;
        cin >> k;
        set<pair<int, int>> blocked;
 
        for (int i = 0; i < k; ++i) {
            int r, c;
            cin >> r >> c;
            blocked.insert({r - 1, c - 1});
        }
 
        cout << (isInteresting(blocked) ? "YES\n" : "NO\n");
        cout.flush(); // Flush output as required
    }
 
    return 0;
}
 

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9 31 5
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5
6 5
2 11
1 14
8 15
2 14
5
2 14
1 14
8 16
6 5
2 11
3
2 2
1 4
8 30
10
3 1
3 11
5 16
7 21
4 16
3 5
7 31
3 9
7 25
3 27
10
3 1
3 9
7 25
3 27
7 21
4 17
3 5
7 31
4 16
3 11