What are examples of sources of external data?

<div jsname="ARU61" aria-controls="_qphGX52-CrqK4-EPv8KYsA84" aria-expanded="false" id="_qphGX52-CrqK4-EPv8KYsA85" jsslot="" role="button" tabindex="0" jsaction="CQwlrf;fastbutton:CQwlrf"><div jsname="xXq91c" data-kt="KjDZibD2ut-WnGeVqofnhdz1vuMBscr3wKrDntFL_7j_4JufhufSAZW0gPbA6MDB8AE" data-hveid="CAEQCw" data-ved="2ahUKEwidu-q3r7nrAhU6xTgGHT8hBvYQuk4oAHoECAEQCw">What are examples of sources of external data?<div jsname="dcydfb" aria-labelledby="_qphGX52-CrqK4-EPv8KYsA85" id="_qphGX52-CrqK4-EPv8KYsA84" jsslot="" jsaction="CQwlrf;fastbutton:CQwlrf"><div jsname="oQYOj" data-hveid="CAEQDA" data-ved="2ahUKEwidu-q3r7nrAhU6xTgGHT8hBvYQu04oAXoECAEQDA"><div data-md="83"><div aria-level="3" role="heading"><div><div>
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