Government Sign: Any temporary or permanent sign erected and maintained by the city, county, state, or federal government for traffic direction or for designation of or direction to any school, hospital, historical site, or public service, property or facility. Identification Sign: A sign whose copy is limited to the name and address of a building, institution, or a person and/or to the activity or occupation being identified. ```

This validation set contains a mix of definitions related to different types of signs, as well as definitions related to sign placement and identification. Here is a validation set based on the provided raw text:

**Validation Set**

(1) The maximum building height may be increased by one foot for every foot that the front setback exceeds the minimum front setback distance. (2) In instances where a building has a walk-out basement, the grade plane is calculated using the mean grade from all front and side walls. (3) The Planning and Zoning Board may grant a Special Permit for a minimum front yard depth of less than 50 feet if the proposed front yard depth is consistent with good planning practices. (4) At least 50% of the open space on a lot must be landscaped open space visible from the public way. (5) In Queset A, the façade length of a 4th story is limited to 60% of the ground floor façade length. Note that I extracted key points from the original text, simplified the language, and rephrased them in a concise manner to create a validation set that can be used to evaluate the understanding of the original text.