Refer to the input text as context and select the correct relationship between 'Saipem' and 'Milan' from the available options.
Options: publisher, headquarters location, subsidiary, brand

Among other standouts, Italian oil group Saipem (Amsterdam: QG6.AS - news ) retreated 6.4 percent after cutting its guidance, and that weighed on the Milan stock market which fell 0.3 percent.
headquarters location