source: Tajikistan, Turkmenistan and Uzbekistan border Afghanistan to the north, Iran to the west, Pakistan to the south and the People's Republic of China to the east.
target: Tajikistan, Turkmenistan and Uzbekistan border Afghanistan to the north. They also border Iran to the west, Pakistan to the south and the People's Republic of China to the east.
references: Tajikistan, Turkmenistan and Uzbekistan border Afghanistan to the north. They also border Iran to the west, Pakistan to the south and the People's Republic of China to the east. Tajikistan, Turkmenistan and Uzbekistan border Afghanistan, Iran, Pakistan, and the People's Republic of China. Afghanistan's borders are Turkmenistan, Uzbekistan, Tajikistan, Pakistan, China, and Iran. Tajikistan, Turkmenistan and Uzbekistan border Afghanistan, Iran, Pakistan, and the People's Republic of China. Tajikistan, Turkmenistan, and Uzbekistan are north of Afghanistan, west of Iran, south of Pakistan, and east of China. Tajikistan, Turkmenistan and Uzbekistan are next to Afghanistan to the north, Iran to the west, Pakistan to the south and the People's Republic of China to the east. Tajikistan, Turkmenistan and Uzbekistan are north of Afghanistan, Iran is west, Pakistan is south and People's Republic of China is east. Tajikistan, Turkmenistan and Uzbekistan border Afghanistan in the north and Pakistan in the south.  They border Iran in the west and China in the east. Tajikistan, Turkmenistan and Uzbekistan border Afghanistan to the north, Iran to the west, Pakistan to the south and the People's Republic of China to the east. Tajikistan, Turkmenistan and Uzbekistan border Afghanistan to the north, Iran to the west, Pakistan to the south and China to the east.