Add submission: Red and black flag

entries/red_and_black_flag.json

+{
+    "id": 3861285651,
+    "name": "Red and black flag",
+    "description": "The red and black flag is commonly used by anarchists and specifically anarcho-communists.",
+    "links": {},
+    "path": {
+        "0": [
+            [
+                984,
+                151
+            ],
+            [
+                999,
+                151
+            ],
+            [
+                999,
+                162
+            ],
+            [
+                984,
+                162
+            ]
+        ]
+    },
+    "center": {
+        "0": [
+            992,
+            157
+        ]
+    },
+    "source_list": {
+        "lemmy": [
+            4214537
+        ]
+    }
+}
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