public static String extractFlatDepth(String sourceText) {
		String[] lines = sourceText.split("\n");
		String result = "";
		for (int i = 0; i < lines.length; i++) {
			if (lines[i].contains("Depth/Size")) {
				// Depth/Size:
				// 115 Bathrooms: 3
				result = lines[i + 1].split(" ")[0];
				break;
			}
		}
		try { // if result is with a wrong format, then reset it to empty string
			Double.parseDouble(result);
		} catch (Exception e) {
			result = "";
		}
		return result;
	}