import pandas as pd
import numpy as np
data = {'Name': ['Alice', 'Bob', 'Charlie', 'David', np.nan, np.nan],'Age': [25, np.nan, 35, 40, np.nan, np.nan],'City': ['New York', 'San Francisco', 'Los Angeles', np.nan, np.nan, np.nan],'Salary': [5000, 6000, 5500, 6200, np.nan, np.nan]}
df = pd.DataFrame(data)
df_clean = df.dropna(subset=['Name', 'Age'])
print(df_clean)