CREATE TABLE "people" (
    "People_ID" int,
    "Age" int,
    "Name" text,
    "Nationality" text,
    "Graduation_College" text,
    PRIMARY KEY ("People_ID")
)

CREATE TABLE "company" (
    "Company_ID" real,
    "Name" text,
    "Headquarters" text,
    "Industry" text,
    "Sales_in_Billion" real,
    "Profits_in_Billion" real,
    "Assets_in_Billion" real,
    "Market_Value_in_Billion" real,
    PRIMARY KEY ("Company_ID")
)

CREATE TABLE "employment" (
    "Company_ID" int,
    "People_ID" int,
    "Year_working" int,
    PRIMARY KEY ("Company_ID","People_ID"),
    FOREIGN KEY ("Company_ID") REFERENCES `company`("Company_ID"),
    FOREIGN KEY ("People_ID") REFERENCES `people`("People_ID")
)
SELECT Headquarters FROM company GROUP BY Headquarters ORDER BY COUNT(*) DESC LIMIT 1
Show the most common headquarter for companies.