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// in functions.php
// get template part
function oe_team_shortcode( $attr ) {
    ob_start();
    get_template_part( 'team-part' );
    return ob_get_clean();
}
add_shortcode( 'team', 'oe_team_shortcode' );

// create file in directory called
team-part.php

// use shortcode
[team]