Context: CREATE TABLE table_name_70 (height__m_ INTEGER, location VARCHAR, height__ft_ VARCHAR)
Question: What is the lowest height in meters for the building located in mailänder straße 1, sachsenhausen-süd, with a height shorter than 328.1 ft?
Answer: SELECT MIN(height__m_) FROM table_name_70 WHERE location = "mailänder straße 1, sachsenhausen-süd" AND height__ft_ < 328.1