Code snippet

def check_invoice_context(spans):
    account_no_count = 0
    tax_invoice_index = -1

    # Iterate through the spans to count "Account No" occurrences and find first "TAX INVOICE" or "INVOICE"
    for i, span in enumerate(spans):
        if "Account No" in span[1]:
            account_no_count += 1
        if ("TAX INVOICE" in span[1] or "INVOICE" in span[1]) and tax_invoice_index == -1:
            tax_invoice_index = i

    # Check conditions: Tax invoice must exist and there must be at least two "Account No" before it
    if tax_invoice_index != -1 and account_no_count >= 2:
        # Check if all "Account No" entries appear before the first "TAX INVOICE" or "INVOICE"
        count_before_tax_invoice = sum(1 for j, span in enumerate(spans[:tax_invoice_index]) if "Account No" in span[1])
        return count_before_tax_invoice >= 2

    return False